Ok, guys, finger crossed, but looks like we solved our updating issues forever.
For the geeks: the solution is here.
The problem: windows installer wasn’t (for sure) overwriting the file fsharp.core.dll cause the version number was the same, and maybe it wasn’t overwriting some other stuff too.
The solution: editing the the installer.msi with orca.
We did a couple of tests and it seems to work.
but fingers crossed :geek:
(wow, strong emotions going on here )