Go to the folder where you keep EPW
Epic Perfect World\config\element\
in element folder you will find the file named
version.sw
When opened with notepad/notepad++ it will show you
99 0
or 98 0
Make sure it's 98 0
Save the file once it's changed to 98 0
Then try to open patcher and let it auto update, it shouldnt be a long download
OR
use the manual patch
If that fails aswell, I suggest redownloading
or unzipping the .zip you had of EPW, take manual patches and do 1 by 1 til 99
I'll speak with inf so we can perhaps upload a v99 clean soon
Apologies for delayed reply