The Version column in the Edit tab shows the tags versions that will be saved when the song is actually saved so if it includes ID3v1 then upon save all the allowable fields in an ID3v11 tag have their values updated from whatever is in the main edit tab so I cannot really see how the values are not being written, and that is why there is no sync option it is implicit in the way Jaikoz works.
But that is not to say that there isn’t a problem.
Are you aware of the View/Show View Pane and Show/Show ID3 Tabs options ?
Enable both of these and reopen the file in Jaikoz , does the ID3v1 tab contained the expected information ?
If so then everything is okay, or is the information not shown in other program, you could send me the file so I can look to see if the ID3v1 tag has been written to the file correctly.