You can share your address book in multiple ways. Please, refer to this tutorial. Personally, I think using RU Server for syncing (method 3) would be overkill, so you can just utilize your Dropbox or Box.net account to share the address book (method 2). Or, if you don't change the contents of the address book often, you can simply manually export/import the address book file (method 1).
Just to clarify, you cannot UN-lock the PC by sending Ctrl+Alt+Del command, correct? What happens when you simply click on a user icon on the Windows lock screen? When you are in Full Control mode, that is.
Thanks for the report. We didn't change anything in Ctrl + Alt + Del mechanism in this version.
Am I right assuming that rebooting of the remote PC helped? Sometimes it's actually necessary to reboot the remote PC after Host installation. Especially when it comes to using "system" features like Ctrl + Alt + Del.