1) Whatever the latest and greatest codec collection for Win 10 may be? I have no idea... but I'm sure some users here do smile!

2) Oh, OK. Put them in "custom artwork classes"!

3) Sure. I didn't say anything different. Just OMIT the .7z suffix of the file name when you enter its path in QMC2 (same as on the command line, BTW).

6) No, it shouldn't. Or better, that's WHY there are custom artwork classes. Everyone has different wishes, and the collections (esp. AntoPISA's) grow and spread faster than I could add new classes... so I've decided to make it up to the user to define whatever he/she likes. Everything else is too static and would require my work every time the community changes their current trends smile.

A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]