diff --git a/README.md b/README.md
index 96ba7d0168f5913ae6bf6294e8293327ae0caf6d..104e4c953925b3feaec3e337c03ce8097b01d643 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ Latest version available at
 
     git clone https://github.com/skylot/jadx.git
     cd jadx
-    ./gradlew clean build pack
+    ./gradlew clean build
     
 (on Windows, use `gradlew.bat` instead of `./gradlew`)
 
@@ -28,15 +28,14 @@ and also packed to `build/jadx-<version>.zip`
 Run **jadx** on itself:
 
     cd build/jadx/
-    bin/jadx-cli -d out lib/jadx-core-*.jar
-or
-
+    bin/jadx -d out lib/jadx-core-*.jar
+    #or
     bin/jadx-gui lib/jadx-core-*.jar
 
 
 ### Usage
 ```
-jadx [options] <input files> (.dex, .apk or .jar)
+jadx[-gui] [options] <input file> (.dex, .apk or .jar)
 options:
  -d, --output-dir     - output directory
  -j, --threads-count  - processing threads count
diff --git a/build.gradle b/build.gradle
index 34729e68b10810f02722d3bc3905d0f4a73f222d..432a7c19b904da02c0a3eab04dc26bb313a32ca6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,3 @@
-apply plugin: 'idea'
-
 ext.jadxVersion = file('version').readLines().get(0)
 
 subprojects {
@@ -17,7 +15,7 @@ subprojects {
     }
 
     manifest {
-        mainAttributes("jadx-version" : jadxVersion)
+        mainAttributes('jadx-version' : jadxVersion)
     }
 
     dependencies {
@@ -31,7 +29,7 @@ subprojects {
     }
 }
 
-task copyArtifacts (type: Sync, dependsOn: ["jadx-cli:installApp", "jadx-gui:installApp"]) {
+task copyArtifacts (type: Sync, dependsOn: ['jadx-cli:installApp', 'jadx-gui:installApp']) {
     destinationDir file("$buildDir/jadx")
     ['jadx-cli', 'jadx-gui'].each {
         from tasks.getByPath(":${it}:installApp").destinationDir
@@ -44,6 +42,10 @@ task pack (type: Zip, dependsOn: copyArtifacts) {
     from copyArtifacts.destinationDir
 }
 
+task build (dependsOn: pack) {
+    description = 'Build jadx distribution zip'
+}
+
 task clean(type: Delete) {
   delete buildDir
 }
diff --git a/jadx-cli/build.gradle b/jadx-cli/build.gradle
index e5d25495887e155e2f41816557dba9762f3305ac..355fcad7d3dbe879a840d119dc639226a8c83d53 100644
--- a/jadx-cli/build.gradle
+++ b/jadx-cli/build.gradle
@@ -1,15 +1,13 @@
 apply plugin: 'application'
 
-mainClassName = "jadx.cli.JadxCLI"
+mainClassName = 'jadx.cli.JadxCLI'
+applicationName = 'jadx'
 
 dependencies {
-    compile(project(":jadx-core"))
+    compile(project(':jadx-core'))
     compile 'com.beust:jcommander:1.30'
 }
 
-build.dependsOn distZip
-build.dependsOn installApp
-
 startScripts {
     doLast {
         // increase default max heap size
diff --git a/jadx-cli/src/main/java/jadx/cli/JadxArgs.java b/jadx-cli/src/main/java/jadx/cli/JadxArgs.java
index fa1fe2deb179cd2f87a8f11b8efd814c0adb9f51..3e92b2f89211c00161375ef46d7ed1540b704a73 100644
--- a/jadx-cli/src/main/java/jadx/cli/JadxArgs.java
+++ b/jadx-cli/src/main/java/jadx/cli/JadxArgs.java
@@ -80,6 +80,7 @@ public class JadxArgs implements IJadxArgs {
 			processArgs();
 		} catch (JadxException e) {
 			LOG.error(e.getMessage());
+			printUsage();
 			System.exit(1);
 		}
 	}
@@ -103,10 +104,13 @@ public class JadxArgs implements IJadxArgs {
 
 		if (input.isEmpty()) {
 			if (inputRequired)
-				throw new JadxException("Please specify at least one input file");
+				throw new JadxException("Please specify input file");
 			else
 				return;
 		}
+		if (input.size() > 1) {
+			throw new JadxException("Only one input file is supported");
+		}
 
 		if (outDirName == null) {
 			File file = new File(files.get(0));
@@ -129,6 +133,7 @@ public class JadxArgs implements IJadxArgs {
 		JCommander jc = new JCommander(this);
 		// print usage in not sorted fields order (by default its sorted by description)
 		PrintStream out = System.out;
+		out.println();
 		out.println("jadx - dex to java decompiler, version: " + Consts.JADX_VERSION);
 		out.println();
 		out.println("usage: jadx [options] " + jc.getMainParameterDescription());
diff --git a/jadx-cli/src/main/java/jadx/cli/JadxCLI.java b/jadx-cli/src/main/java/jadx/cli/JadxCLI.java
index 23b18d39b1f50588b0f9dab93ce6f00390d957f2..7fe1039bea3c3b158df7f813f40b92ff06b95a79 100644
--- a/jadx-cli/src/main/java/jadx/cli/JadxCLI.java
+++ b/jadx-cli/src/main/java/jadx/cli/JadxCLI.java
@@ -2,11 +2,7 @@ package jadx.cli;
 
 import jadx.api.Decompiler;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 public class JadxCLI {
-	private static final Logger LOG = LoggerFactory.getLogger(JadxCLI.class);
 
 	public static void main(String[] args) {
 		JadxArgs jadxArgs = new JadxArgs(args, true);
diff --git a/jadx-gui/build.gradle b/jadx-gui/build.gradle
index 9137b7b97c2395ac7b09f7e6741337eb0c70fdcf..922723e439f225e1c027651f019e43e9943c8ad0 100644
--- a/jadx-gui/build.gradle
+++ b/jadx-gui/build.gradle
@@ -8,9 +8,6 @@ dependencies {
     compile 'com.fifesoft:rsyntaxtextarea:2.0.7'
 }
 
-build.dependsOn distZip
-build.dependsOn installApp
-
 startScripts {
     doLast {
         // increase default max heap size
diff --git a/jadx-gui/src/main/java/jadx/gui/utils/OverlayIcon.java b/jadx-gui/src/main/java/jadx/gui/utils/OverlayIcon.java
index b01cecd7d1cf1a86074aa40a4052128945ca8c5b..2fd8b1eacd27f49263903304cfcbdcbe94e110f6 100644
--- a/jadx-gui/src/main/java/jadx/gui/utils/OverlayIcon.java
+++ b/jadx-gui/src/main/java/jadx/gui/utils/OverlayIcon.java
@@ -4,7 +4,6 @@ import javax.swing.Icon;
 import java.awt.Component;
 import java.awt.Graphics;
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.List;
 
 public class OverlayIcon implements Icon {
@@ -48,10 +47,6 @@ public class OverlayIcon implements Icon {
 		icons.add(icon);
 	}
 
-	public void addAll(Collection<Icon> icons) {
-		icons.addAll(icons);
-	}
-
 	public List<Icon> getIcons() {
 		return icons;
 	}