You have to install the 5.00 M33-6 before doing the fix for the M33-7!

There was a little bug in CFW M33-6 recovery menu.
When changing the option for version.txt, the options for Speed up MS access can be affected.
Therefore Dark Alex released a fix, the bugfix was too small for a complete new M33-7.
So he only released the recovery.prx for M33-7 and he only released it on the forums, which are now gone.

Just copy the recovery.prx to flash0:/vsh/module/ and click "yes" to override.

here is the download