Lets say you delete your cfg.txt, like most of us do sometimes when backup, or do clean LFS install but we still want to keep old screenshots, replays, setups, ...

After your cfg.txt goes missing/deleted/alerted simply screenshots you save go from lfs_00000001.bmp again and it doesn't care if its overwriting something or anything.

VIDEO

EDIT: Probably a better idea would be to use date and time in a name of screenshot.