Failed to open map

Hello,

i`m using UE 14.3.1 to build a landscape in my project (project has already been saved in 14.3.1). At some point there was a problem and windows needs a restart. Now when i try to open my project with UE 14.3.1 the map can´t be open anymore.

Message:
Failed to open map file. This is most likely because the map has been saved with a newer version of the engine.

As i even haven´t installed a version greater than 14.3.1 there must be another reason for these problem.

I already tried to verify the version 14.3.1 from the launcher.

Are there any chances to open/repair the map?

Thank you

Uwe Xander