Downloading the latest version does not wipe out any existing databases. Installing the latest version does not wipe out any existing databases. Running the latest version will modify your databases, by updating only those records that you did not add or modify.

You probably either installed CSDS into a different folder, or you explicitly deleted the CSDS folder.

CSDS is generally installed in C:\SQDATA. If you've changed that to a different folder, then each time you upgrade, you must make sure to use the changed folder instead of C:\SQDATA.

Try searching your computer for the file 'music.dat'. If you have more than one of these files, you probably installed CSDS into a different folder.