How I can return to the default recent apps switcher in Marshmallow ?

[AC Question]

I rooted my s3 and installed a 6.0.1 ROM and my phone became WOW !!
BUT, I enabled the OMNIswitch app (which has been installed with ROM)
but I didn't like it and wanted to back to the default recent apps switcher,
I disabled OMNI but the default didn't back,
I deleted OMNI and also it didn't back.
I installed the ROM again (without reset data factory) and it didn't back !!
I read someone said that it also won't back even if I reset to data factory.
I even tried to set the "recent apps switcher" function to another button but nothing had changed !!
PLEASE .. Can anyone help me, please !!

 

[B. Diddy]

Moved to the S3 Rooting/ROMs forum.