Seems there is a problem with version 2.53, at least with my system.
My music collection is located on a NAS.
Using the context menu in the windows explorer mp3tag shows me 'strange' directory paths (comparable to temp-paths); never had that problem with version 2.52 (after re-installing version 2.52: no problem/ problem fixed; afterwards another installing of version 2.53: bug occured again).
Could you give an example of a comparable temp-path?
Also: in some cases it is necessary to add the NAS as (pseudo)-drive (e.g. N:) instead of using a pathname with a servername in it (e.g. \\NAS).
What happens if you open the files on the NAS with the functions of the FILE menu in MP3tag?
The whole thing look like the conversion of long path names to short ones. I do no know where and why this happens.
During installation of Mpetag: have you ticked "Create menu shortcut"? Or do you use the old one?
Anyway: this is just guessing as I do not have the testing equipment, and actually I have no clue how to mend it.
But if you have found a workaround you can continue to work.
you're right: after installing the recent firmware-update (from last week) the v2.53 works perfectly
... a little bit strange as the system was on current fw-status when opening the thread but anyhow