Launcher is installed on C disk even if the instance is on another disk

[fabinzne]

When a friend of mine tries to install FTB App he is getting a problem because the mine launcher is installed at C:/ disk and the modpack is installed at E:/ disk.

Well as i'm seing the path for the %APP_DATA% is get by this contant:

public static final Path WORKING_DIR = Paths.get(System.getProperty("user.dir"));

But when the user is using a SSD for windows and other disk to install apps, the FTB the minecraft launcher is installed at the C:\users\USER\AppData\Local.ftba\bin and the modpack instance is ok on the E:/ disk.

The only problem is that the C:/ disk is with low storage and I need to install this at the E:/ disk

idk if the true problem is with this repo but is what i'm thinking;