Models Failing Following Re-Installtion of Staad Pro

I recently had some issues with Staad Pro force closing on my machine following some IT issues. I re-installed Staad which sorted the problem, however now a number of my models are failing where they didn't before the re-install.

I'm currently designing to Euro Codes, and have defined the parameters as I did before, ie SGR1 NA1 etc.

Can anyone help me as to what else could be causing the failures post re-installing?

Many Thanks, John