Hello everyone! After I while checking the avi, I found the solution the deformed feet and I honestly feel kind of stupid ;P
The solution (at least for me) is that I was wearing the "no feet deformation" that came with the Bonus Items, along with the "for 100% body thickness". So if you're wearing the version with 100% thikness + no leg deformations or just the no feet deformation, just take it off and wear one that doesn't say no feet deformation! ;D
Here, take a look:
HOPE IT HELPS OTHER PEOPLE ^U^
P.S: For the undeformer, it works if you open the animation and repeatedly play it, it's the same as the script I've received it. If you were wearing a rigged mesh (avatar or accesory) that deformed you after taking it off, you should undeform yourself first and in the worst cases, relog.