Hi again,
I can find no folder named ProgramData, so I can't check there. I have already checked the ProgramFiles (x86) folder and as I said, there is a sub-folder for Analog Lab 3 in there, but no sign of 2.
I shall try re-installing Analog Lab 3 via the Software Centre, and if this has no poisitive effect I shall contact Support Services as you have suggested.
Thanks.