Extracting file from MSI package

[sendersu]

I"ve similar issue - with the same dll name!
you have to inspect carefully each dll in temp dir (with stange names like ~blabla.tmp,etc!
I recommend to search by contents for validate word
but do it when app is asking s/n, not after it was closed.
the dll definitely must be present in temp dir!
you could also use procmon to monitor when it'll be written there....
good luck