ABSOLUTELY. Old programs and older operating systems, csche information that may tell the two not to do their thing together. Look at the cache in the case of replicate passwords who do not match. One , the right one has to go, and the sorrect one stay. Remove all traces and try a reinstall. I want to mention that (if) this is a reoccuring problem, removing the cache before a reinstall, or, in the case of installing a different flavor of Spotify, Android, has one too..., Windows flavors, Android flavors too, just check those out that they are compatable., and Windows Vista have something called install points, so do not ne surpri then cache proplems pop up smack in the middle of an install.
Thank YOU for telling us you have answered the problem. I actually have my old spotify ver.09.6.xx without any problem than I can't use the applications without kranging around a bit. It comes from creating compatable programs (adding a little coding...)