It turned out that creating the folder D:\data\programmi\Calibre Portable\Calibre Settings\caches solve the problem. But im my opinion calibre, and not the user, should create it during installation, which it does not.
It turned out that creating the folder D:\data\ programmi\ Calibre Portable\Calibre Settings\caches solve the problem.
But im my opinion calibre, and not the user, should create it during installation, which it does not.