Once you get through this error, try to keep 2 copies of the sim. on your PC. Don't be quick to update until U see how others are getting on with the newer ver. I know this was an update by way of Steam. but the rule applies just the same.
Opt. in to the Beta on steam if U prefer to use it. and download the 1.2.8 Beta of DCS. until fix is offered if U wish that is.