Saves like those don't work when you move to a different version, there's a reason the developer reminds users to make sure their save is in town square in every update article.
Long story short, you fucked up and broke your saves.
Anko
Recent community posts
I could receive hate for what I'm about to say, but I think that a developer needs to stop extending the olive branch, at some point: this web page clearly states what kind of game MGD is, those who download it should prepare themselves to put in a modicum of effort, at the least.
It's still an RPG, one is supposed to "grind it out" and eventually become strong enough to defeat the opponent he/she struggles with.
What I'm trying to say is: the developer is putting in a lot of work into making his/her game an enjoyable RPG (with a sexual twist/theme/veil on its mechanics), those who don't even want to put in a bit of effort into earning the lewd stuff they're after are better off playing something else.
Respect the product you're downloading.
When there's an important update:
In order to not lose progress, you first create a backup copy of save folder (located in "game" folder)->Download the new/most recent version of the game.->Move your save there.
For smaller stuff (like bug fixing/minor things between versions), developer tends to release Patch Data which you can download on the update's article.
EDIT:
As far as I know, the game does not update automatically.
As already implied, she's weak to Aphrodisiacs and the likes. Anyway, what I was going for with my previous message was more: A terrible idea idea to save right before boss fights, more importantly, overwriting your save with that. Always keep a save at the main town plaza, you might lose some progress, but as a silver lining… upon failure/hitting a roadblock, you can always reload and come back better prepared.
You screwed yourself over on your own, that's not an issue of the game.
From the game blog linked on this page:
Content that I will not be adding to this game, in no order:
Futa
Furry
Scat
Piss
Vore
Under aged
Excessive Violence and Gore.
M/M content
Probably some other stuff too that i've forgotten about
Source - https://monstergirldreams.blogspot.com/p/about.html
1. Venefica at full power in her normal form says "Hi" with her 4444 arousal stat.
Remember, this is still a role-playing game, you're going to need to grind a bit… eventually (well, this applies to the average, heard the dev managed to beat her while being severely under-levelled during testing, but keyword: dev).
From the Game Blog linked on this page:
"Content that I will not be adding to this game, in no order:
Futa
Furry
Scat
Piss
Vore
Under aged
Excessive Violence and Gore.
M/M content
Probably some other stuff too that i've forgotten about"
So, there you have it. No dickgirls from the creator, but the game can be modded, go crazy with that.
Someone who plays the game at a normal pace or, more generally, the legit way won't be able to get the required amount of Eros fast enough (unless we're talking of someone close to a day one player), plus, I remember the dev stating something along the lines of it being a troll ending. More importantly, though, like you said… the user specifically asked: Aren't there any game overs where a monster girl takes me as her permanent slave? >_>
The only game over which fits that description is Dark Perpetua's, currently. The suggested candy shop one could be considered a soft ending, but even that's a stretch.