I tried to update it two times, waited a few days, but it's not working..
Can anyone tell me how to do it?
I don't know what your trying, but under my contributions in the tablature tab in the far right, next to the date you submitted the tab, there's an update button. I've never tried using it, so if your having problems with that I can't help you, but I just thought I'd throw it out there since no one else had answered.