diff --git a/mix/ContractCallDataEncoder.cpp b/mix/ContractCallDataEncoder.cpp
index 08e764955..bc3322145 100644
--- a/mix/ContractCallDataEncoder.cpp
+++ b/mix/ContractCallDataEncoder.cpp
@@ -248,12 +248,15 @@ dev::bytes ContractCallDataEncoder::decodeBytes(dev::bytes const& _rawValue)
 }
 
 QString ContractCallDataEncoder::toString(dev::bytes const& _b)
+{
+	return QString::fromStdString(dev::toJS(_b));
+}
+
+QString ContractCallDataEncoder::toChar(dev::bytes const& _b)
 {
 	QString str;
-	if (asString(_b, str))
-		return  "\"" + str +  "\" " + QString::fromStdString(dev::toJS(_b));
-	else
-		return QString::fromStdString(dev::toJS(_b));
+	asString(_b, str);
+	return  str;
 }
 
 
@@ -269,6 +272,8 @@ QVariant ContractCallDataEncoder::decode(SolidityType const& _type, bytes const&
 		return QVariant::fromValue(toString(decodeBool(rawParam)));
 	else if (type == QSolidityType::Type::Bytes || type == QSolidityType::Type::Hash)
 		return QVariant::fromValue(toString(decodeBytes(rawParam)));
+	else if (type == QSolidityType::Type::String)
+		return QVariant::fromValue(toChar(decodeBytes(rawParam)));
 	else if (type == QSolidityType::Type::Struct)
 		return QVariant::fromValue(QString("struct")); //TODO
 	else if (type == QSolidityType::Type::Address)
diff --git a/mix/ContractCallDataEncoder.h b/mix/ContractCallDataEncoder.h
index 629e46b0d..bec048c50 100644
--- a/mix/ContractCallDataEncoder.h
+++ b/mix/ContractCallDataEncoder.h
@@ -71,6 +71,7 @@ private:
 	bool asString(dev::bytes const& _b, QString& _str);
 	QList<int> extractDimension(QString const& _type);
 	void encodeArray(QJsonArray const& _array, QList<int> _dim, SolidityType const& _type, bytes& _content);
+	QString toChar(dev::bytes const& _b);
 
 private:
 	bytes m_encodedData;
diff --git a/mix/qml/js/ProjectModel.js b/mix/qml/js/ProjectModel.js
index 6fce7686d..f9c7a611c 100644
--- a/mix/qml/js/ProjectModel.js
+++ b/mix/qml/js/ProjectModel.js
@@ -252,8 +252,10 @@ function doCreateProject(title, path) {
 			files: [ contractsFile, indexFile ]
 		};
 		//TODO: copy from template
-		fileIo.writeFile(dirPath + indexFile, htmlTemplate);
-		fileIo.writeFile(dirPath + contractsFile, contractTemplate);
+		if (!fileIo.fileExists(dirPath + indexFile))
+			fileIo.writeFile(dirPath + indexFile, htmlTemplate);
+		if (!fileIo.fileExists(dirPath + contractsFile))
+			fileIo.writeFile(dirPath + contractsFile, contractTemplate);
 		newProject(projectData);
 		var json = JSON.stringify(projectData, null, "\t");
 		fileIo.writeFile(projectFile, json);
@@ -340,7 +342,8 @@ function newContract() {
 function createAndAddFile(name, extension, content) {
 	var fileName = generateFileName(name, extension);
 	var filePath = projectPath + fileName;
-	fileIo.writeFile(filePath, content);
+	if (!fileIo.fileExists(filePath))
+		fileIo.writeFile(filePath, content);
 	var id = addFile(fileName);
 	saveProjectFile();
 	documentAdded(id);