In answer to your question; no, we still have problems with the app. If the vista machine has never had the app it will install and run just fine. but, if there is an old version of the app already on the vista machine then that is the version that is run.
I am just wondering how do upgrades get done on other software apps? For instance, whenever Acrobat comes out with a new upgrade it seems like there is no problem doing the upgrade. I haven't looked but doesn't the .exe file and all other files, etc. remain the same and are put into the existing directory?
What we try to do is remove the old version, files, icon. etc. and then push the new version to the same place. But, that just doesn't seem to be the case.