MSI package update with Appsync

I am new to thinapp environment…can someone please provide me the steps to update the MSI package with ThinApp AppSync

- How to update a MSI thinapp package which is already installed on the machine (Appsync enabled package)

- If I copy the thinapp package (DAT and entry point) the Appsysnc works fine ….but if I install the MSI package on the machine, it doesn’t update with the new version of package .

- Do I need to copy new version of MSI package to the shared location or the actual DAT and entry points files ? ( I mean ,should I add the Appsysnc URL as …….package.msi or …..package.DAT ) ?

- Do I need to do anything different for MSI package to get updated with the new version of thinapp package ?