FF3usME dialogue editor broken?

I've found some threads here that talk about such a bug when saving twice without closing the editor in between, but these threads were a couple years old and were talking about an older version of FF3usME, so I'm unsure if this is the cause. I'm using version 6.8.

As for Backups, my last one is 5 days old, but I've done quite a lot in between. I never thought that anything could happen when using FF3usME, so I was a bit lazy with constant backups. I guess that's my own fault. I will heed your advice and edit stuff only in the exported txt file from now on, hopefully this will prevent future troubles.

EDIT: Wait, I just double-checked: the editor's zip file says version 6.8.0, but the editor tool itself (when you hover the mouse over it) says version 6.7.1. Does that make a difference? Is this still the latest version, or was a wrong one accidentally packed into the archive?