[Q] restore international to stock rom

[IMarks]

I wanted to have sense 6 on my device but sadly enough this is not working optiomal for me.
Now sense 6 is officially released to the HTC One Max i want to restore my phone back to stock.

Due some rooting issues i don't have my backup anymore.
i have an international HTC One Max but cannot find how to restore everything back to original.

any help would be appriciated.