Really sad that I spent almost 100h of game time and got hit with this.

There is a female companion in Arthes which you can saved her from not being burnt for practising alchemy . She is, by default, an alchemist profession with Apprentice level. And I suspect, that her profession's type and level are hardcoded, because she HAS A BUG THAT RESET HER PROFESSION BACK TO THIS DEFAULT value. The reason I deduct this, is because this happened 2 times already, the first time happened, I just think weird as I wasn't playing around with alchemy too much. But this time, after I grinded her to Master, and after playing around in Ludern, she dropped from Master to this default value (alchemist apprentice). I believed it might be because I was careless when she got hit by plague , or got injured, therefore losing stats, and the game might check that how can a Master alchemist have this low stats, get the ♥♥♥♥ down to default value you go.
And no, I do not swap her to another profession, I keep her always in alchemy, and it is impossible to drop level, you can only drop xp, so please don't say I swapped her profession
Anyway, does anyone know how to edit save files, the game is very good, I can look past it, but bugs like this should be fix ASAP.