Work towards liteloader support. Fix creating new instance

logic/DerpInstance.cpp

@@ -35,10 +35,16 @@ DerpInstance::DerpInstance(const QString &rootDir, SettingsObject *settings, QOb
 	d->m_settings->registerSetting("IntendedVersion", "");
 	d->m_settings->registerSetting("ShouldUpdate", false);
 	d->version.reset(new DerpVersion(this, this));
-	reloadFullVersion();
+	if (QDir(instanceRoot()).exists("version.json"))
+	{
+		reloadFullVersion();
+	}
+	else
+	{
+		clearFullVersion();
+	}
 }
 
-
 std::shared_ptr<Task> DerpInstance::doUpdate(bool only_prepare)
 {
 	return std::shared_ptr<Task>(new DerpUpdate(this, only_prepare));
@@ -280,9 +286,8 @@ bool DerpInstance::setIntendedVersionId(QString version)
 {
 	settings().set("IntendedVersion", version);
 	setShouldUpdate(true);
-	auto pathOrig = PathCombine(instanceRoot(), "version.json");
-	QFile::remove(pathOrig);
-	reloadFullVersion();
+	QFile::remove(PathCombine(instanceRoot(), "version.json"));
+	clearFullVersion();
 	return true;
 }
 
@@ -327,6 +332,13 @@ bool DerpInstance::reloadFullVersion(QWidget *widgetParent)
 	return ret;
 }
 
+void DerpInstance::clearFullVersion()
+{
+	I_D(DerpInstance);
+	d->version->clear();
+	emit versionReloaded();
+}
+
 std::shared_ptr<DerpVersion> DerpInstance::getFullVersion()
 {
 	I_D(DerpInstance);