The installer for stellaris is currently running, and I have 2 problems:
1) I have no clue where it's installing to. Nothing new has appeared in my heroic games folder and it's more than halfway done.
2) I want to add mods, which would go to C:/user/documents under windows. How do I access the filesystem that I saw in the installer when selecting where to install (C:GOG Games/Stellaris) to add these mods?