Florin Ular wrote:
Is this really such a rare issue that nobody knows what it might be?
I searched the forums and found several people had this issue some years ago, but nobody cared to share the solution.
They just confirmed that it was finally fixed with the help of Trados Support team, but the solution itself seems to be a well guarded secret.
You have answered own question. Being an installation issue, it was probably resolved at the time by the Trados Support team. However, since this version is no longer supported by SDL, this is probably not relevant any more.
I would suggest deleting your settings files, deactivating your license (important!), uninstalling and reinstalling.