Windows 10 and Wave Lab 6

Yes it (wavelab6)works and save…open…:also ok
I try to find a solution for wavelab 5…:work by draging a file but crash when save or open .If somebody can also continue this topic.
Why to use wavlab 5 if I own wavelab 6 : on my laptop : if I don’t need to take allways the dongle could be great!
BEst regards