I just finished an update of EXM from 3.4 to 3.5 and despite the fact, that everything ran smoothly, how do I know that 3.5 is there?
If check the DLL is the answer, please advise which one and if is there any other way to find that out?
What about: shell -> desktop -> All Applications -> System -> License Details?
Login to Sitecore
/sitecore/system/Packages/Installation history/Email Experience Manager
Check its child (children) - name of the item is date & time when the package was installed and version is stored
Package version field