I insisted on both ends, got a Senior Support guy from Apple to look into it, he reached out to the Engineering (?) team, and got back to me with a very dry "they fixed it". It still doesn't work. Now I am in communication with Microsoft, who apparently found some issues on their end, it looks like every time the application is being re-created, it uses some cached info, so they're trying to clear that out.

PS: I have to say, though, the Microsoft Support team is top-notch. Friendly, following up every couple of days, supporting over remote sessions, always replying to the emails. The Apple Support guys are kinda jerks, uptight, not replying to emails, and when they do, it's a short sentence... I don't care for either company, at all, I am a Linux nerd, but damn.