WLM2009 is the same thing as 9.0 which is the same thing as version 14.
Firstly, uninstall 9.0, then install 
WLM 8.5 again.
If you have trouble installing 8.5 because your pc thinks 9.0 is still installed, then you can use 
ZapMessenger to get rid of 9.0 then install 8.5 
