Even in trial status, you are considered a PRO member and have the scans available to use! If you allow the trial to convert to a paid status, there will be no interruption in the scan. If you have scans running and your trial lapses or you cancel the trial, all the scans you have running will be halted and you will have the option to upgrade to a paid PRO membership to keep them running, or (if you don't want the membership) you can create the scan new and pay the single scan price to run it again.