2
You can update to 2.0.16 via the main download and you should do so for the bug fixes/security updates alone.
Please can you explain what you mean by:
"i cannot get the XOOPS protecter to work with it"
Protector 2.5x and 3.0x work perfectly with 2.0.16; if you really mean "I can't install it with 2.0.16" then there's all the help you need available on here and in Madfish's excellent installation guide.