I am having the exact same problem. When I get to SCAN FOR TOKENS and press the button, my computer freezes up.
TRYING TO BUY WHEN TOKENS APP SUCKS PLEASE ADVISE
Mine freezes when I "scan for tokens" as well. I have been trying to figure out how to sell some of the tokens I purchased for 2 days now. I cannot figure out how to get them out of my WHEN wallet. I am extremely frustrated and get no help at all when I contact support. Can anyone help?
I received this reply from MyCrypto Support. It fixed this issue:
First off, I'm sorry to hear about this issue.
There is a known bug in MyCrypto where it can freeze if you select a token in the address selection modal. Please try changing it back to "-Token-", it's not required in order to unlock your account. You should be able to successfully scan for tokens afterwards.
Let me know if that solves the problem.