Trouble getting rid of them really old citrix receiver versions (6.x / 7.x)?

Came across an issue removing some really old citrix clients (version 7.x) in a locked-down environment that was running (ahem) windows vista machines. Had issues upgrading the receivers on the machines. As these machines had ICA clients using a version that was packaged using installshield they used an EXE file. The method to remove these files … More Trouble getting rid of them really old citrix receiver versions (6.x / 7.x)?