With the new patch 1.1.0.9, the ChatIO feature has been disabled.
The good news is the mission editor will now allow to determin MGRS coordinates. The coordinates have been replaced and will be given when the target group has been destroyed, instead of relying on the ChatIO script.
Some other changes in Version 5 include new call sounds added, addition of radar to SAM Sites, addition of new skins yellowblack to flights, flares on unreported tank column.
Since the ChatIO script required to be used in MP, the changes made allows Version 5 to also be flown in SP. The addition of a wingman to flight Colt to assist with ground targets.
This one seems to be my favorite, hope you enjoy.