[thiago.eec]

Originally Posted by jist

Thanks againthiago.eec

I got it to work, but it turns out flawed.
Things like the header bar and main panels remain white.

The window header is white for me too, even without using environment variables.

Originally Posted by jist

I am guessing it has to do with running a portable install. Well, it's even more complicated: I am running the normal calibre.exe from the deeper Calibre\Calibre Portable\Calibre folder.
(because else Calibre won't work with libraries on other drives/partitions.)

I'm giving up for now, thanks for helping to give it a try, much appreciated.

I've tried pointing to calibre.exe here, and it worked just the same. I really don't know what the problem might be.