uninstall existing pyship app prior to installation of a new version #6
Description
If the user installs an updated application via the regular installer (not via automatic updating via a clip), the prior clip is not removed first. This causes a couple of issues:
- The old clip will never be used, but takes up space
- If the user tries to do an uninstall after the application has been updated via an installer, only the most recent clip is known to the uninstaller, so the prior clips will not be removed and will hang out forever unless the user does a manual delete in the program files directory (most people don't know how to do this and/or don't want to).
The solution is to have the installer check for a prior version and do an uninstall before doing the install.