[jecilop]

Okay, I am doing some testing - testing that will also help me learn how Calibre works behind the scenes.

Friday's update to come (2.45?) is supposed to include the fix to the custom logic column copy per a reply I received. That would allow me to copy everything to a new library, but that would still require a massive upload to back the files up...MASSIVE on std to slow internet mean effectively never fully backed up.
While this would solve the database and thus column view issues, I would like to avoid this step if possible.

I'd really like to know where the custom preference info such as custom color columns, custom icon rules, customer searches, and virtual libraries is stored. Specifically, I'm looking for a file that I can open in it's raw or code form an manipulate if desired (such as copy/paste from old to new). I've done extensive changes to these since my April'15 prefs backup json, so the info there is only a partial help. Where can I access that active file to attempt to get that info from the current information that IS updating and staying when I add new stuff?

I've done this type of things with Tag Mapper when doing A LOT of stuff because sometimes interacting with plug-ins is very tedious and time consuming. It would be that way to "fix" a new library on a rebuild I think.

Still, I'm trying to run some more tests to learn about the last, but copying the entire old library to a new folder on the laptop still takes forever for 30gb and loads of folder and files....

And thanks, BR.