diff --git a/.idea/inspectionProfiles/idea_default.xml b/.idea/inspectionProfiles/idea_default.xml
index 3fdb0646e31..b00ca857451 100644
--- a/.idea/inspectionProfiles/idea_default.xml
+++ b/.idea/inspectionProfiles/idea_default.xml
@@ -55,9 +55,6 @@
     <inspection_tool class="DoubleCheckedLocking" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="ignoreOnVolatileVariables" value="true" />
     </inspection_tool>
-    <inspection_tool class="DuplicateCondition" enabled="true" level="WARNING" enabled_by_default="true">
-      <option name="ignoreSideEffectConditions" value="true" />
-    </inspection_tool>
     <inspection_tool class="EmptyStatementBody" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="m_reportEmptyBlocks" value="false" />
     </inspection_tool>
@@ -106,6 +103,8 @@
           <Problem reference="com.intellij.testFramework.PlatformTestCase#doCreateRealModuleIn" reason="Not static anymore in 181 after 7dacf096c47d2125e17031c71a037b63ab00ec53" />
           <Problem reference="com.intellij.openapi.progress.ProgressManager#getProgressIndicator" reason="Nullable in 181. Temporary use progressIndicatorNullable instead." />
           <Problem reference="org.jetbrains.java.decompiler.main.decompiler.BaseDecompiler#addSpace" reason="Method was replaced with outher methods in 182. Use addSpaceEx instead." />
+          <Problem reference="com.intellij.psi.codeStyle.CommonCodeStyleSettings#copyFrom" reason="Absent in 173. Use CompatibilityKt.copyFromEx instead." />
+          <Problem reference="com.intellij.psi.codeStyle.CommonCodeStyleSettingsManager#copy" reason="Removed since 181. Use CompatibilityKt.copyFromEx instead." />
         </list>
       </option>
     </inspection_tool>
diff --git a/idea/formatter/src/org/jetbrains/kotlin/idea/core/formatter/KotlinCodeStyleSettings.java b/idea/formatter/src/org/jetbrains/kotlin/idea/core/formatter/KotlinCodeStyleSettings.java
index 2b293ff3ddf..d7a40c154e7 100644
--- a/idea/formatter/src/org/jetbrains/kotlin/idea/core/formatter/KotlinCodeStyleSettings.java
+++ b/idea/formatter/src/org/jetbrains/kotlin/idea/core/formatter/KotlinCodeStyleSettings.java
@@ -23,8 +23,10 @@ import com.intellij.openapi.util.WriteExternalException;
 import com.intellij.psi.codeStyle.*;
 import org.jdom.Element;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.idea.formatter.KotlinObsoleteCodeStyle;
 import org.jetbrains.kotlin.idea.formatter.KotlinStyleGuideCodeStyle;
+import org.jetbrains.kotlin.idea.util.FormatterUtilKt;
 import org.jetbrains.kotlin.idea.util.ReflectionUtil;
 
 import static com.intellij.util.ReflectionUtil.copyFields;
@@ -63,6 +65,12 @@ public class KotlinCodeStyleSettings extends CustomCodeStyleSettings {
     @ReflectionUtil.SkipInEquals
     public String CODE_STYLE_DEFAULTS = null;
 
+    /**
+     * Load settings with previous IDEA defaults to have an ability to restore them.
+     */
+    @Nullable
+    private KotlinCodeStyleSettings settingsAgainstPreviousDefaults = null;
+
     private final boolean isTempForDeserialize;
 
     public KotlinCodeStyleSettings(CodeStyleSettings container) {
@@ -95,6 +103,7 @@ public class KotlinCodeStyleSettings extends CustomCodeStyleSettings {
     public KotlinCodeStyleSettings cloneSettings() {
         KotlinCodeStyleSettings clone = new KotlinCodeStyleSettings(getContainer());
         clone.copyFrom(this);
+        clone.settingsAgainstPreviousDefaults = this.settingsAgainstPreviousDefaults;
         return clone;
     }
 
@@ -136,10 +145,17 @@ public class KotlinCodeStyleSettings extends CustomCodeStyleSettings {
         }
 
         KotlinCodeStyleSettings tempSettings = readExternalToTemp(parentElement);
-        if (KotlinStyleGuideCodeStyle.CODE_STYLE_ID.equals(tempSettings.CODE_STYLE_DEFAULTS)) {
+        String customDefaults = tempSettings.CODE_STYLE_DEFAULTS;
+
+        if (KotlinStyleGuideCodeStyle.CODE_STYLE_ID.equals(customDefaults)) {
             KotlinStyleGuideCodeStyle.Companion.applyToKotlinCustomSettings(this, true);
-        } else if (KotlinObsoleteCodeStyle.CODE_STYLE_ID.equals(tempSettings.CODE_STYLE_DEFAULTS)) {
+        } else if (KotlinObsoleteCodeStyle.CODE_STYLE_ID.equals(customDefaults)) {
             KotlinObsoleteCodeStyle.Companion.applyToKotlinCustomSettings(this, true);
+        } else if (customDefaults == null && FormatterUtilKt.isDefaultOfficialCodeStyle()) {
+            // Temporary load settings against previous defaults
+            settingsAgainstPreviousDefaults = new KotlinCodeStyleSettings(null, true);
+            KotlinObsoleteCodeStyle.Companion.applyToKotlinCustomSettings(settingsAgainstPreviousDefaults, true);
+            settingsAgainstPreviousDefaults.readExternal(parentElement);
         }
 
         // Actual read
@@ -153,4 +169,10 @@ public class KotlinCodeStyleSettings extends CustomCodeStyleSettings {
 
         return tempSettings;
     }
+
+    public void restore() {
+        if (settingsAgainstPreviousDefaults != null) {
+            copyFrom(settingsAgainstPreviousDefaults);
+        }
+    }
 }
diff --git a/idea/formatter/src/org/jetbrains/kotlin/idea/core/formatter/compatibility.kt b/idea/formatter/src/org/jetbrains/kotlin/idea/core/formatter/compatibility.kt
new file mode 100644
index 00000000000..4aa2ce8845f
--- /dev/null
+++ b/idea/formatter/src/org/jetbrains/kotlin/idea/core/formatter/compatibility.kt
@@ -0,0 +1,17 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.core.formatter
+
+import com.intellij.psi.codeStyle.CommonCodeStyleSettings
+
+/**
+ * Method copyFrom is absent in 173.
+ * BUNCH: 181
+ */
+fun CommonCodeStyleSettings.copyFromEx(source: CommonCodeStyleSettings) {
+    @Suppress("IncompatibleAPI")
+    copyFrom(source)
+}
\ No newline at end of file
diff --git a/idea/formatter/src/org/jetbrains/kotlin/idea/core/formatter/compatibility.kt.173 b/idea/formatter/src/org/jetbrains/kotlin/idea/core/formatter/compatibility.kt.173
new file mode 100644
index 00000000000..bb0f27982f9
--- /dev/null
+++ b/idea/formatter/src/org/jetbrains/kotlin/idea/core/formatter/compatibility.kt.173
@@ -0,0 +1,18 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.core.formatter
+
+import com.intellij.psi.codeStyle.CommonCodeStyleSettings
+import com.intellij.psi.codeStyle.CommonCodeStyleSettingsManager
+
+/**
+ * Method copyFrom is absent in 173.
+ * BUNCH: 181
+ */
+fun CommonCodeStyleSettings.copyFromEx(source: CommonCodeStyleSettings) {
+    @Suppress("IncompatibleAPI")
+    CommonCodeStyleSettingsManager.copy(source, this)
+}
\ No newline at end of file
diff --git a/idea/formatter/src/org/jetbrains/kotlin/idea/formatter/KotlinCommonCodeStyleSettings.java b/idea/formatter/src/org/jetbrains/kotlin/idea/formatter/KotlinCommonCodeStyleSettings.java
index 3466b4a5b0e..92ceb633323 100644
--- a/idea/formatter/src/org/jetbrains/kotlin/idea/formatter/KotlinCommonCodeStyleSettings.java
+++ b/idea/formatter/src/org/jetbrains/kotlin/idea/formatter/KotlinCommonCodeStyleSettings.java
@@ -21,6 +21,8 @@ import org.jdom.Element;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.idea.KotlinLanguage;
+import org.jetbrains.kotlin.idea.core.formatter.CompatibilityKt;
+import org.jetbrains.kotlin.idea.util.FormatterUtilKt;
 import org.jetbrains.kotlin.idea.util.ReflectionUtil;
 
 import java.lang.reflect.Field;
@@ -34,6 +36,12 @@ public class KotlinCommonCodeStyleSettings extends CommonCodeStyleSettings {
     @ReflectionUtil.SkipInEquals
     public String CODE_STYLE_DEFAULTS = null;
 
+    /**
+     * Load settings with previous IDEA defaults to have an ability to restore them.
+     */
+    @Nullable
+    private KotlinCommonCodeStyleSettings settingsAgainstPreviousDefaults = null;
+
     private final boolean isTempForDeserialize;
 
     public KotlinCommonCodeStyleSettings() {
@@ -59,10 +67,16 @@ public class KotlinCommonCodeStyleSettings extends CommonCodeStyleSettings {
         KotlinCommonCodeStyleSettings tempDeserialize = createForTempDeserialize();
         tempDeserialize.readExternal(element);
 
-        if (KotlinStyleGuideCodeStyle.CODE_STYLE_ID.equals(tempDeserialize.CODE_STYLE_DEFAULTS)) {
+        String customDefaults = tempDeserialize.CODE_STYLE_DEFAULTS;
+        if (KotlinStyleGuideCodeStyle.CODE_STYLE_ID.equals(customDefaults)) {
             KotlinStyleGuideCodeStyle.Companion.applyToCommonSettings(this, true);
-        } else if (KotlinObsoleteCodeStyle.CODE_STYLE_ID.equals(tempDeserialize.CODE_STYLE_DEFAULTS)) {
+        } else if (KotlinObsoleteCodeStyle.CODE_STYLE_ID.equals(customDefaults)) {
             KotlinObsoleteCodeStyle.Companion.applyToCommonSettings(this, true);
+        } else if (customDefaults == null && FormatterUtilKt.isDefaultOfficialCodeStyle()) {
+            // Temporary load settings against previous defaults
+            settingsAgainstPreviousDefaults = createForTempDeserialize();
+            KotlinObsoleteCodeStyle.Companion.applyToCommonSettings(settingsAgainstPreviousDefaults, true);
+            settingsAgainstPreviousDefaults.readExternal(element);
         }
 
         readExternalBase(element);
@@ -121,7 +135,10 @@ public class KotlinCommonCodeStyleSettings extends CommonCodeStyleSettings {
 
     @Override
     public CommonCodeStyleSettings clone(@NotNull CodeStyleSettings rootSettings) {
-        CommonCodeStyleSettings commonSettings = new KotlinCommonCodeStyleSettings();
+        KotlinCommonCodeStyleSettings commonSettings = new KotlinCommonCodeStyleSettings();
+
+        commonSettings.settingsAgainstPreviousDefaults = settingsAgainstPreviousDefaults;
+
         copyPublicFieldsOwn(this, commonSettings);
 
         try {
@@ -214,6 +231,12 @@ public class KotlinCommonCodeStyleSettings extends CommonCodeStyleSettings {
         return provider == null ? null : provider.getSupportedFields();
     }
 
+    public void restore() {
+        if (settingsAgainstPreviousDefaults != null) {
+            CompatibilityKt.copyFromEx(this, settingsAgainstPreviousDefaults);
+        }
+    }
+
     private static class SupportedFieldsDiffFilter extends DifferenceFilter<CommonCodeStyleSettings> {
         private final Set<String> mySupportedFieldNames;