Yes the latest version is v6.20. Not really sure why you only have 3 option on that area. Try this, select the first option. Without changing back to the last option, reboot your system. After it was done rebooting, check back, do you see 4 option buttons?
If no, you still have 3 option only, please try purge and reinstall steps as mention here : [Link]. Just make sure to redownload the latest version from your account page. Reboot after the purge. Reinstall and reboot again after the installation. Retest and report back here.
Thank you,
Basj,
Stardock Community Assistant.