it can be done using txt file or database. Just create a resource as db or lines from file . Now use PARSE LINE option in TOOLS .Parse in same order as data in txt file or db . Ex user,pass,email,cookie etc. Untick Reuse Resource will make load new line every time you parse.
@BAS-Viet-Nam Okay, thank you for the hint. Worked on many sites with these 2 functions without any problems. So I will try it with "Wait while element exists" on this specific site.
Hopefully I don't get in an endless waiting-loop ;)