Hi, Emmanuel. Just to let you know - the Time Machine did not help, as it restored the system completely to its previous condition, including the OS X Mavericks. And the problem came back again. So for now I know for sure that software works on a clean install of OS X 10.8.5 Mountain Lion. I'm still not sure if it will work on a clean install of OS X 10.9.5 Mavericks. Now I will have to do another clean install of 10.8.5 and will manually restore all data from my backup.