- If you have registered games but the icons don't show in the forums, log out of your Paradox account then back in - that usually fixes that. If it does not then log out again, and now delete your browser cache and all Paradox cookies, then log in.
- If your game icons used to show and now don't, link your Paradox account to your Steam account here
then go here
and hit the Sync Owned Items button. All Paradox games you have on Steam will be registered automatically. Non-Steam games will still use the Registration Key system.