There's a discord link on the website.
discordapp.com/invite/AvefKKHIf someone could sign in there and drop a few ubx files in, I'll see what I can do about adding support for them.
The architecture is open enough that it should be possible to add other formats. Last one I added was .fit files, and it's been a while, but I am doing some other work in the system now, so it would be a good time to look at it.