Originally posted by iHasMods
Im on 4.40 when i go to system information , but when im in the Toolbox it says im on 4.30 so i gues im on 4.30 ?

Rebug 4.30 ! no i did not enable QA flag before going to 4.30 !
This means you're on Rebug 4.30.x.
Just install Rebug Toolbox, launch it, enable QA and install Rebug 3.55.4 from XMB. No need for the 999 downgrader.
But why do you want to downgrade back to 3.55?