Thank's for the heads up, sadly that's also one of the things I had tried.

The ticket I opened with Jolla Care was closed and I have been redirected to developer-care@jolla.com - forwarding them my issue. They are yet to answer me.

I hope I'm not screwed here. Back in my Symbian days, bricking a device was nearly impossible - even dead flashing and correcting the partitions layout was easily possible, because we had all the tools necessary. With Jolla, Qualcomm and what not - this is an extremely sad situation. Dependency on the big manufacturers and THEIR rules makes me angry.