How to edit Garmin video clips together?

[Wainuitech]

I have a Garmin dash-cam 67W.  Each 1-minute video file is stored as .mp4 and .glv.
I wish to edit a collection of the files together into a short, but longer than 1-minute video.
When I try with Pinnacle Studio, the Pinnacle simply shuts down.  It's okay with just one 1-minute file but spits the dummy with more than one file.
Any suggestions, please?
TIA, Peter.

Never a fan of online applications for this type of thing, I used MP4 Joiner  From memory worked OK, other wise I would have deleted it.   And price is right along with really simple to use.