The passwords are encrypted using a hash, a salt, and the dbsecret in your config.lua, the easiest way to reset your password would be to register another account using the password you want to use, and copy the hash and salt over to the original account.
I can't really comment on MySQL workbench as I feel it's pretty mediocre and I don't use it, but you can do this in terminal pretty easily.
Code:
mysql -u<user> -p
use swgemu;
select * from accounts where username='<newly created account name>';
Take note of the password and salt
Code:
update accounts set password='<the password from the newly created account>' where username='<account name you forgot the password for>';
update accounts set salt='<the salt from the newly created account>' where username='<account name you forgot the password for>';
Hope this helps.
