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[ohrenkino]

@xpac5896a

I know somebody said that when you install the latest version it does not delete any export functions, but it does.

I am still convinced that the installation of a new MP3tag version does not delete the user settings as long as you stay in the same kind of installation mode (standard vs. portable) and install the same kind of architecture (32-bit vs. 64-bit).
For all other installation variations, please see

Notes on the 64-bit version of Mp3tag

I've released a 64-bit version of Mp3tag a few days ago and received a few questions about differences between the 32-bit version and the 64-bit version. To make it short, there should not be any noticeable differences except for two things: The 64-bit version uses 64-bits to address memory and is no longer limited to 2 GB per application. While the Library feature of Mp3tag is already a very viable solution for large libraries, loosening the memory restriction is one of the key benefits of …

and

Download and Installation – Mp3tag Documentation

So unless you have erased substantial parts of your data storage, the old settings should still be there.
Possible locations are described in the documentation.