Currently, if you attempt to freeze and save the config to an existing file, then you are informed that you cannot do so, because the file already exists. I am willing to code and submit a pull request that would allow the tmuxp freeze command to overwrite the specified file.

Does anyone see any problems with this, because I did not look anywhere else in the code except the function responsible for the command?

The following is a linked issue, but it got closed because of staling – #64.