When saving a map, WrpTool sometimes saves until some percentage and then suddenly stops responding (of course always then when you have not a backup available)

It can't be reproduced, in most times it saves without problems then the next time I save the map and dang it hangs while saving.
Needless to say that then the map is corrupted and all the work is gone.
Haven't seen a post about this here yet, but it's hard to believe I am the only one.
Maybe in one of the next versions, could there be an autobackup function?
Also another thing I noticed, WrpTool doesn't switch to the current directory when saving maps.
An example: I work on two maps, Alpha.wrp and Bravo.wrp. I first open Alpha, work on it and save it. Then I open Bravo, work on it and when I want to save it, it saves Bravo Map as the Alpha.wrp in the Alpha folder.