The last major optimization was with V0.732, with some minor work on memory usage around V0.750.
Now you said that your game crashed multiple times. I assume you are playing V0.800 and if these were hard crashes (ie the application stopped responding and you had to shut it down with task manager, or a BSOD) then I can only suggest downloading V0.790 from
TheBlueKnight's post on page 59 (the links are still up) as this version is stable, if not particularly well optimized. You will miss armour transmogrification and permanently recruitable minions, but as these systems are pretty buggy right now, you will not be missing much.
If your crashes were soft, in particular the loading screen bug when entering battles, then once the battle has "loaded" behind the loading screen (you can hear your weapon being drawn if you press "1") press "f" and a prompt should appear saying "Do you want to return home". Click on yes and return to your palace!
If the battle was a roving band, that band will have disappeared. It appears as if the bug is caused by the non-spawning of enemies and taking you directly to a "battle won" condition, but whatever you
do not press "enter" as this will send you to the battle won screen, still hidden behind the loading screen, and effectively hard lock the game.
Another bug that you encounter with V0.800 is the non-appearance of one or more of your succubi companions that you chose for a battle. Peculiarly, their presence is still registered by the game as they will still pick up loot once your inventory is full!
Solution:- When I encountered this bug I noticed that one of the companions (Arisha in this case) had a slightly, but noticeable, additional lean to the left as we see it in the inventory screen compared to the other succubi. In the palace I entered free pose mode and summoned Arisha. Exit free pose mode and Arisha's appearance in the Inventory was back to normal, and no more missing succubi! If you cannot tell which succubi is causing the problem, just summon them all one by one.
I hope this helps!