6.5.6 is without addons. You can download 6.5.5 + addons . Then you should zip every addon folder, than upload like a normal wp plugin on plugin tab.
1) You should download 6.5.5 for Addons.
2) Delete old revslider.
3) Upload 6.5.5 + addons version revslider to
/public_html/wp-content/plugins/
4) After finish the upload 6.5.5 you should zip every addon you want to use.
Don't forget to selecet ZIP
I and my pc's native language is Turkish. But i believe you can find the right buttons on your language. Thats why i didn't translate.
5) Then you should upload these zip folders like normal wp plugins.
6)At the end of these steps you can see your addon on your revslide addon list