E-bay blocked me once when I signed from a different device and since then myibidder stopped working. I changed the password and successfully entered my e-bay account, but myibidder keeps telling me that login and password are wrong.
Tried to delete it from chrome, add again, add it on another computer and it doesn't work.
Please unblock me, I need it so much!

Your sniper's account has nothing to do with your eBay account.
If your eBay account is blocked, that's between you and eBay only, but your sniper's account is not blocked because of this.
Please resolve the issue with eBay to restore your eBay account.

If you can't login to the sniper, you need to reset your sniper's password.