Roll Back from Plesk 10.2 to 10.1.1

[Sec.F]

Hi Plesk Team
after the upgrade that I have made from Plesk 10.1 to to Plesk 10.2 my Plesk Panel is loading very very slow ,also I can't reach the ftp accounts.
My quetion is how I can roll back to Plesk 10.1 through console ?
Or do you have any other update to fix this issue?

Thank you in advance!