You can only revalidate in a sim if;
1. Your previous renewal/re-validation was in an aircraft.
2. Your IR has not expired (is still valid), in which case it is referred to as a re-validation. As your IR's have expried it is referred to as a renewal and therefore must be renewed in an a/c.
Sorry to be the bearer of expensive news !! I know from experience having let my IR expire by a week or so last year !!
CG.