I have a working PSM assistent without updating to 3.50 from 3.36
1. Downloading a PKG with the PSM assistent from the Internet (Google)
2. Copy the file to a USB- stick
3. You must have a hacked ps3 with a cfw
4. Copy the files with the ps3 package manager to your ps3
5. Go online with your ps3 from your account
6. On pc: stick the vita with your usb cable to your pc and open qcma
7. On Ps vita go to the contentmanager and open it (byepass for update)
8. Stick out the usb cable and stick on the ps3 and copy the file to your ps vita
9. The Psm assistent worked without updating the ps vita
Sorry for my bad English
I hope a can help


