I'm running into the same problem that "Create identity" doesn't work. I've done a new install to link to an existing folder on another machine. I use separate identities to give myself more control with sharing, similar to 1.4-style configuration. On this computer, which is a Windows 10 64-bit install connected to an old NT4-style Samba domain, when it asks me to create an identity, the "Create identity" button clicks once, but then does nothing. Any ideas?