Make sure you backup your files before installing the beta, after installing the beta and playing with it for a moment, i tried making a route and convert it to a track the beta didnt start the next moment.
It was checking datafile's and after a 30 minutes it loaded some file's not al and renamed al of my birds-eye files.
I had to use a backup to restore, and lost al my "work" i did between making the back-up and now re-instal.
(back up was 15 days old)
No data lost only the set up of the libarary-tree in basecamp.
English language ,it wont uninstall your previous version, you can have both on your hd
This means that removing a file in the beta it also removes the file in the "original" basecamp, and you can only start or the beta or the original basecamp, you cant run both on the same time.