Hi we have more recent version of Smode ( 9.0 and 9.1 ) but not for studio
so I needed to be sure witch one you have
it seem that you have your doc file that does not correspond to your version of Smode
you can go to this path and delete the content it will remove the documentation
"C:\ProgramData\Smode Studio\Packages"
if you want to have the embeded doc you can download the corect version for the 8.6 here:
http://download.smode.fr/Packages/Smode%20Doc/stable/Smode%20Doc-master-8.6.59.420d5cc1-win64.zip
and then unzip it in the folder you deleted the old one