Game won't save anymore

[Rutana]

Hi, I'm in dire need of some help.
I haven't played anymore since 2015, and today I returned to the game.
But I quickly had to find out, that everytime I start the game, it tells me there are unsaved changes to my properties, the game starts without sound (all sounds set to 0), and nothing is saving.
I played for an hour today, and it didn't saved any progress.
I then played again for an hour and, again, no progress saved.
What's worse, I entered all Shift Codes from the last years that were still redeemable, including weapon and skin Shift Codes, and redeemed them ingame, and now it registrates the Shift codes as being redeemed, but the items, skins and keys are gone, because the game didn't saved the progress.
And yes, I left the game normally, and not by Alt+4.
Is there anything I can do?
I'm not crying about the 2 hours lost, I gladly play them again, but I would love the game saving my progress again and I would REALLY love to get my Shift items back q.q

[KoNeE]

enabled steam cloud?

[Sysgen]

Check the save folder permissions. Also your a/v may be an issue so add an exception for the game and save folders.

[Rutana]

Thanks for your replies!
Yes, Steam Cloud is activated.
The folder was save protected, but disabling that and synchronizing the game with the cloud didn't changed a thing.
I don't know what you mean with a/v?

I also opened up a ticket at gearbox support. They replied to me, with the best kind of reply I ever got from a customer support :D (completely in the style of Tiny Tina), but unfortunately, their troubleshoots didn't helped either.

I sent them some requested files now for them to look through. Hopefully, they'll find a way to fix the issue. When I know the problem (and solved it), I'll keep you updated!

[Sysgen]

a/v = anti virus.

[Rutana]

Thank you!
After everything failed, this was the issue.
My Antivirus/Firewall programm has the option to protect folders from programms it doesn't trust - and Borderlands Pre-Sequel was one of them.
Now my game saves again! :)

...I just hope I can get my skins back... :/