I've just tried the new version because it includes a Folder-sync function which I really want.

It messed up my PC, plenty. It made my network adapter look like a new piece of hardware which Windows couldn't get drivers for.

A System Restore sorted it and I am back on the old version (6.83.14.1) so if you are going to give this a go it would be worth creating a System Restore Point just before you start.