Reinstall Videopad repeatedly, testing the behavior each time until it inserts. No need to download again. This may take a number of tries but installing is very quick.
The same-numbered version has several slight variants. It's not a bug, but it can be confusing.
As for tech support... https://tinyurl.com/r89tpcw
You can also click the chevron at the top-right of the VP window to send a suggestion or file a bug.