Luminar 3 Database Opening failed?

I have the demo version which is still 20 days left. And so far, I'm so convinced of Luminar that I wanted to buy it when it's over.

But since before, this error always comes when I try to open it. On English forums, I did not learn anything that helped me. Does anyone have experience with it and if necessary tips?

Or if not, does anyone know any other image editing programs that do not cost too much? Since I like Dazn and Netflix as subscriptions, I exclude a subscription for Photoshop and LR directly.

I have free image editing programs from Rawtherapee up to this something as usual as Gimp, actually everything through, but was not convinced. On my old PC (2 weeks ago) I was very satisfied with Cyberlink. But somehow it does not work on my new laptop, which is why I said goodbye to it first.

The following support forums thread has apparently been around for months:
https://community.skylum.com/hc/en-us/community/posts/360033842691-Database-opening-failed?page=1#comments

The most promising solution seems to be the deletion of the user directory (C: \ user \ (username) \ AppData \ Roaming \ Luminar 3 \).