The first is that file associations in qBittorrent have changed. I am not talking about associating .torrent files to qB, but associating applications to file types so that they open when I double-click a downloaded file from a torrent within qB. Since a few days ago, when I double-click a file I only get an error prompt saying "it's not a folder" so nothing can be opened that way. I'm not sure it's qBittorent's fault, but it's a start, isn't it?
What I'm trying to understand is where qB takes its file associations, since I have checked both Nautilus/Gnome and Dolphin/KDE and, for instance, video files are appropriately associated with a media player (Gnome is what I run but since qB is a QT app I also took the other environment into consideration). I found something about Chrome messing with file associations somehow, but the relevant Google page seems unaccessible.
The second issue is about the GUI theme of qBittorrent. Again, I'm suddenly unable to make it look like a Gnome/GTK app (I have a dark theme). I can only pick QT themes, while, if I remember correctly, I was once able to set "GTK+" as a theme and it would use whatever the current GTK theme was (SMplayer works this way, for example).
Like I said, I'm not asserting these are strictly qB issues, but that's where I experience them so that's where I have to start. One question certainly is: where does qB obtain file associations to open files?
Thanks in advance for any hints/help.