Game freezes when loading scenario or save game

[Castellon]

Were you ever able to do it or it has never worked?

 

[Castellon]

Yup that will do it, that messes with the formating, you prob had it autosave or, you now associated that file type with the spreadsheet program.
You could look at your associations and manual delete that one.

Also try a complete wipe of the game, find instructions in the sticky thread on the subject. Then a fresh install and the latest patch 1.3a.