Understandable, raoulvdberge. Even at GitHub, you described it again how it's working. Don't know, why some people simply won't do a bit of research before posting "not working".
Even if it really wouldn't work anymore: A crashreport would at least be helpful to address the issue directly and it could somehow be understandable, because of frequently upgraded Forge-versions :).
Well, pardon me: I totally forgot to thank you for it. Should be done now :).
Edit: Something is really messed up here at CurseForge, isn't it? A reply should be below of an answer, not above. Weird.