You are not able to recover a flight using smartCARS Premium, despite having the feature enabled.
Log out and log back into smartCARS Premium and try again. If this step does not work, try step 2.
Clear all your files from %temp%. It is generally safe to delete them all as they are temporary files. Some files may say they're in use and do not allow delete - these files can be ignored.
Once the files are cleared, restart smartCARS and try again.
If step 2 does not resolve the issue, please open up a ticket.