I just tried it on a new and clean machine and watching with process explorer what's happening in the background. Snagit 20.0.1 installed by MSI with the license key and language german via SCCM, then updating it with snagit.exe (20.0.2) from command line with the parameter /s worked fine. I tried the same with the MSI 20.0.1 and english language and then updating it with the in SCCM published update from you and this worked fine too. And this time the uninstall didn't show the error code 350. So I think, yes, the same installer can update both languages.