CA-145686: (Fix for) Deadlock in license manager

Revert "CA-139588: Try to prevent Index was out of range exception by invoking on the event thread"

This reverts commit eeb86b795628bdab439bd76fdb5b77b6e193d719.
Merge pull request #217 from GaborApatiNagy/CA-145686-3

CA-145686: (Fix for) Deadlock in license manager