Comskip on programs already recorded without it?

[FrogFan]

Apologies if I've posted this question in the wrong forum.

I've been using Comskip with NextPVR for several years and it works well for me.  Before I added Comskip, I had recorded quite a few programs without it.  I'm wondering if there's a way I can run Comskip on a batch of these programs.  For example, I've recorded multiple episodes of several seasons of "Alfred Hitchcock Presents" before I installed Comskip, and I'd like to create the files and data needed to skip the commercials on all of the episodes when I watch them through NextPVR/Kodi.  Is this possible?

I have used the search function here and couldn't find any information that looked related.

Thanks for any help.