[Dyxan]

I have been using Calibre for many years, unfortunately few last versions of Calibre (W7-64bit) I again get again and again in to following troubles:
secondary task windows do not show up even if the respective process runs as calibre-paralel.exe in the process manager. I cannot figure out any reason. Is there a way via debug to analyse what may cause this kind of problem?
Furthermore very often the secondary window (f.e. i want to open the module update window) starts INVISIBLE so after that calibre becomes unusable, whenewer I click I can here the "ring" but calibre does not react because it wants me to work with the secondary unfortunately "invisible" window wiht "modules/plugin listing" and the only way to work with calibre again is: to shut down the main calibre process..
This is becoming really annoying ...
Of course I tried several times to uninstall and install calibre again with no real improvement.

thank you in advance for any hint