GG/Phyllis quotes: Do either of you have a suggestion for a workaround in Proxy to be able to use a different fps? Something else "Override frame rate?"

For me is better don't touch it. It help to undestand if rendering will have any problem.
Usually, the professional mode is ...
1) to convert the source video with a external program, like Eyeframe (unfortunately only for Windows program) or ffmpeg, to a friendy fps (and change GOP, GroupOfPictures).
2) "to convert" the fps inside Cinelerra-gg, like I have done with your 61 fps video: in Resources->Media, select the video, RMB on that video, choose "Info" option and change video's framerate.

In a old post/thread/issue (I don't remember) I had written that would be useful to have in Media, near the name of the video/audio some fields with the informations: fps, size, (codec?). It would be useful because you could see the info without open another window (Info window) for every file. I understand that it is not easy to implement that feature.

GG/Phyllis: "Eagle Eyes Igor"
My sister call me Ygor. Take a look at https://www.youtube.com/watch?v=nxxSIX3fmmo
Great movie (...and No Comment, please). =)

IgorBeg