Downgrade

I recently updated my CRS125-24G-1S-2HnD from 6.24 to 6.29.1. My internet speed has dropped over 60% with this version. I’m trying to downgrade back to the 6.24. I downloaded the 6.24 npk files and uploaded them via ftp. When I go to system and packages to downgrade all I see there are the 6.29.1 package. Can somebody explain the downgrade process.

Paste individual packages and press downgrade button. After reboot it is finished.

Look to my website here
http://www.wirelessinfo.be/index.php/mikrotik/pages/downgrade

Not in Englisch but folow the printscreens a made