Thanks to this battle and to the awesome feedback of users (specially to jrlepage), DefleMask has been fixed from the most ridiculous bug/crash, introduced in one of the latest updates. Sorry about the inconveniences that this caused and for the data loss.
This is not a normal behavior of DefleMask, and it is a shame for me that some first users suffered this type of things. But well, occupational hazard.
Please re-download it, and I will bother jrlepage to do another battle for SMS!!.