At present, I appear to have resolved the problem I had as I have managed to upload my music to bandcamp once converting the SONAR 7 files to FLAC. In terms of making new music projects, I would like to upgrade to cakewalk bandlab. However, when I did try downloading the software the old projects -as mentioned earlier- could not play as they did in sonar 7 on bandlab and when I looked at the files in SONAR 7 they appeared to have changed as well. To correct this I uninstalled bandlab and reinstalled SONAR 7 via the disks I had from the sonar package I obtained long ago. The projects then played as before.
Is is possible to have both SONAR 7 and bandlab on one PC without alterations being made to the software of SONAR 7? Or, would I need to download bandlab onto a new PC in order not to alter the SONAR 7 program with my old music projects stored there?