Aptoide forgot all added stores, installed software, ... How to get them back?

I'm not really sure when, but it must be roughly 2 weeks ago that Aptoide suddenly didn't display the list of stores I had added during the last months... also, it doesn't show one single installed application and therefore no pending updates. I had also noticed that I was no longer logged in. When I fixed that, it didn't change a thing about missing apps and stores. The applications installed from Aptoide are still on my device and work properly. Any ideas? It's just annoying that I don't get any notification about updates any more as Aptoide has forgotten which programs I have. (I always thought it checks what installed on the device rather than keeping a separate database?) Searching my apps one by one in Aptoide, adding the stores they're in manually and then hoping that Aptoide won't act up again is scertainly an option. I'd just want to know before why this happened, if it happened to anyone else, and if there's a chance that I can restore a backup file that Aptoide maybe hides somewhere?