Installer doesn't update when testing a draft

When I forked the gog installer of Anno 1503 to create a dvd installer, i saved my installer as draft. Strangely enough it said it was submitted for moderation, when I just saved the draft.
When I now want to test the installer with the test installer button, the installer wasn’t changed from the original/forked one. The installer Lutris sees and uses is still the same as the one i started with. I verified it by using the view source button and running the installer.
Now my question is, is it possible to test installers without the need of downloading another installer for the game and then changing the json file manually, to use it with

lutris -i installer.json

Some help and/or clarification would be awesome, so I can add disc installers for some other games without much hassle :slight_smile: