Quote - V4 has had two versions.   In the original, she was nude and bald.   In the Vicky 4.1 edition, she loads wearing a fuzzy bikini and has an anti-typhus hairdo.   I don't think that installing V4.1 can rescue your file (assuming that it was created with basic V4), although...

...V4.1 needs the folders called "DAZ People" in the main Poser directory path, i.e. not in an external runtime.   If you installed V4 into the main Poser runtime, so that you can replace V4 with V4.1 in the same directory path, I suppose that you just may have a chance to re-open the file that way.   If you are lucky and one or other saved file opens, immediately follow what pjz99 said.

Otherwise, you need to play tricks to save memory, I suspect.   Close anything that doesn't need to be running, before trying to open your file.   Once Poser is open, minimise it and then maximise it again, before attempting to open the file.   You may find that a reasonable amount of memory is freed by these gimmicks.   Again, if ever you get the saved file opened this way, refer to the instructions from pjz99.

Yep, nude and bald, it's definitely that V4 we're talking about.
Regarding the folders/directory, once installed I managed them in a very personal manner...I wonder if that might be the reason why V4 screwed up (and not by the meaning we all like LOL)

First of all I made sure to put everything in the "Downloads" path in order to leave the Poser1-7 stuff aside. Then, in the Figures dir we have the DAZ people dir which contains subs I named M3, V3, V4..Each one contains folders like Models, Characters, Hair, Clothing, Poses, Morphs, Materials. I did it manually, sometimes...ehr...Renaming some folders ^_^

I know, it might seem sick and you can call me Adrian Monk (LOL) but if those add-ons won't work because of this, then I don't want Poser anymore! (LOL)

Jokes aside, yesterday I tried again by following the pjz99 suggestion and with the same figures which caused the application to crash. Everything runned smooth, and today I'll be trying to turn the "binary morph" option back on again. That's just to check whether it's a lack of memory problem or not.

Concerning the V4.1...I know you'll be laughing at me, but I'd rather go on with the actual V4 as long as it doesn't cause crashes,  'cause I'm too scared to completely mess up Poser LOL ^_^

Thanks Anyway, I'll be keeping the community updated on this issue for anyone who might experience those kind of problems :)