ITNinja

Check Event Viewer and look for the Windows Installer events. It should tell you what Components are triggerring the self heal. From that, you can start digging your MSI and see if that component contains a file or registry worth keeping. Otherwise, you can remove its GUID to prevent from repairing.

Check "Eventvwr" or take a log of your install.

This will tell you which the component for which self-heal is getting trigerred.
Most probably it should be some file that is getting deleted on launch and is marked as a keypath .

remove the keypath of the component which is triggering the self heal or find out why this resource is getting deleted everytime.