remove unnecessary binding

main/ui/src/main/java/org/cryptomator/ui/addvaultwizard/CreateNewVaultLocationController.java

@@ -48,7 +48,6 @@ public class CreateNewVaultLocationController implements FxController {
 	private final StringProperty vaultName;
 	private final ResourceBundle resourceBundle;
 	private final BooleanBinding validVaultPath;
-	private final BooleanBinding invalidVaultPath;
 	private final BooleanProperty usePresetPath;
 	private final StringProperty warningText;
 
@@ -71,7 +70,6 @@ public class CreateNewVaultLocationController implements FxController {
 		this.vaultName = vaultName;
 		this.resourceBundle = resourceBundle;
 		this.validVaultPath = Bindings.createBooleanBinding(this::isValidVaultPath, vaultPath);
-		this.invalidVaultPath = validVaultPath.not();
 		this.usePresetPath = new SimpleBooleanProperty();
 		this.warningText = new SimpleStringProperty();
 	}
@@ -153,12 +151,12 @@ public class CreateNewVaultLocationController implements FxController {
 		return vaultPath;
 	}
 
-	public BooleanBinding invalidVaultPathProperty() {
-		return invalidVaultPath;
+	public BooleanBinding validVaultPathProperty() {
+		return validVaultPath;
 	}
 
-	public Boolean getInvalidVaultPath() {
-		return invalidVaultPath.get();
+	public Boolean getValidVaultPath() {
+		return validVaultPath.get();
 	}
 
 	public LocationPresets getLocationPresets() {

main/ui/src/main/resources/fxml/addvault_new_location.fxml

@@ -60,7 +60,7 @@
 		<ButtonBar buttonMinWidth="120" buttonOrder="B+X">
 			<buttons>
 				<Button text="%generic.button.back" ButtonBar.buttonData="BACK_PREVIOUS" onAction="#back"/>
-				<Button text="%generic.button.next" ButtonBar.buttonData="NEXT_FORWARD" onAction="#next" defaultButton="true" disable="${controller.invalidVaultPath}"/>
+				<Button text="%generic.button.next" ButtonBar.buttonData="NEXT_FORWARD" onAction="#next" defaultButton="true" disable="${!controller.validVaultPath}"/>
 			</buttons>
 		</ButtonBar>
 	</children>