The latest version of SQL version 5.5.24 is bugged. If you are installing a new version use a previos version!
Also, if your MySQL Workbench version freezes, use the MySQL Server Commandline instead.
After login, enter:
/u<space><databasename><enter>
/.<space><Driveletter:><path><filename.sql><enter>
That works fine and very fast also!