Problem saving files with WP 5.48?

[LiamMason]

I've split a long 80min recording into 19 individual files (MP3), using the 'Split at Bookmarks' feature of 5.48 (Licenced Version)
(Win 10).

It split fine, but I am unable to use the "Save File" or "Save File As" commands, it just does nothing.
It did manage to save the first split file created, but no others.  omegle  xender

I know the files are there, as closing the program, and reopening the Project File loads the individual files, but I don't know where they are stored, or how to re-save / export each file to a new place.   Any tips?

NB: If I copy the contents of a track, and paste it into a new file, it'll save no worries... 
So I guess I can do this, but it's not ideal if I was to do this to a lot of recordings.

[Jsalgado]

In this case we will need to ask for more information, please open a support ticket here: 

https://www.nch.com.au/support/supportcontact.html?software=WavePad&support