One piece of advice for everyone: Even logging on to an old Tinder account for only a few seconds is going to get you turning up in results. So if you're spoken for don't even touch it.
I'm married but I did use Tinder before. One evening I was telling a friend about a time I got catfished and decided to show him the profile to see if it's still the same. Installed Tinder and found the profile; all in all I was only on it for about a minute before uninstalling.
Next morning I've a bunch of messages from people who know me and my wife asking what the fuck I thought I was doing (small town!). It wasn't at all easy to explain convincingly :I
On the plus side, though, I now know that you can permanently delete a Tinder profile through Facebook! No need to log on if you want to rid yourself of it.