update installation hints [skip ci]

Author: Skycoder42

README.md

@@ -43,17 +43,13 @@ Here some sample screenshots of the gui (The rocket of the information dialog is
 There are multiple ways to install the Qt module, sorted by preference:
 
 1. Simply add my repository to your Qt MaintenanceTool (Image-based How-To here: [Add custom repository](https://github.com/Skycoder42/QtModules/blob/master/README.md#add-my-repositories-to-qt-maintenancetool)):
-	1. Open the MaintenanceTool, located in your Qt install directory (e.g. `~/Qt/MaintenanceTool`)
-	2. Select `Add or remove components` and click on the `Settings` button
-	3. Go to `Repositories`, scroll to the bottom, select `User defined repositories` and press `Add`
-	4. In the right column (selected by default), type:
+	1. Start the MaintenanceTool from the commandline using `/path/to/MaintenanceTool --addTempRepository <url>` with one of the following urls (GUI-Method is currently broken, see [QTIFW-1156](https://bugreports.qt.io/browse/QTIFW-1156)) - This must be done *every time* you start the tool:
 		- On Linux: https://install.skycoder42.de/qtmodules/linux_x64
 		- On Windows: https://install.skycoder42.de/qtmodules/windows_x86
 		- On Mac: https://install.skycoder42.de/qtmodules/mac_x64
-	5. Press `Ok`, make shure `Add or remove components` is still selected, and continue the install (`Next >`)
-	6. A new entry appears under all supported Qt Versions (e.g. `Qt > Qt 5.8 > Skycoder42 Qt modules`)
-	7. You can install either all of my modules, or select the one you need: `Qt Auto Updater`
-	8. Continue the setup and thats it! you can now use the module for all of your installed Kits for that Qt Version
+	2. A new entry appears under all supported Qt Versions (e.g. `Qt > Qt 5.11 > Skycoder42 Qt modules`)
+	3. You can install either all of my modules, or select the one you need: `Qt Auto Updater`
+	4. Continue the setup and thats it! you can now use the module for all of your installed Kits for that Qt
 2. Download the compiled modules from the release page. **Note:** You will have to add the correct ones yourself and may need to adjust some paths to fit your installation!
 3. Build it yourself! **Note:** This requires perl, [qpmx](https://github.com/Skycoder42/qpmx) and [qpm](https://github.com/Cutehacks/qpm) to be installed. If you don't have/need cmake, you can ignore the related warnings. To automatically build and install to your Qt installation, run:
 	- `qmake`