A few versions back we changed the default path for file storage. The old system stored the files in each folder so your DataMaster files were stored in the Datamaster folder and the Mastertune files were stored in the Mastertune folder. Then we introduced Mastertune2 and DataMaster2 but left the files stored where they were in the old folders. We got a lot of complaints from people who deleted the old folders and did not understand they removed there files at the same time. So what we did was to move the new installs to use a new folder and leave the old ones in there original locations. This would allow us to no longer make both a Mastertune and Mastertune2 directory for new installs, yet not lose any old information.
You can update all your old files to the new location or just change the path back to the old folder, your choice.