Warning and reminder: back up your Ground2K .lwm files

Hi there:just had a very scary moment while putting some finishing touches on a large Ground2K project. I save frequently and doing so got an error message saying 'file already open' and a crash of Ground2K4. After that I couldn't open the file again; checking it in Wordpad revealed that the writing process had been incomplete and about 1/4 of the file was missing. My latest backup was 3 days old but, after some deep breathing, I had the idea to use it for splicing a 'proper' ending to my broken file. That worked and it seems like I lost 'only' some of my land/water-class assignments and excludes. Phew!It would be great if Ground2K had an automatic backup feature: each time a file is saved the previous version gets re-named to .bak instead of being overwritten. In the absence of this feature, a friendly reminder to religously back up your project files; I almost lost 10 hours worth of tedious work!Cheers, Holger