Regarding the address and login: 
- You can turn off the login mask and password protection in the 
preferences, although I would not recommend this for security reasons.

- If you have set up your network in a fashion that Bonjour can work 
and/or that the IP of your computer stays the same, you can just add 
the AJAX Remote to your bookmarks.

- You can log in once and stay logged in for as long as neither Remote 
Buddy and/or your Mac get restarted.

I, too, strongly encourage you to just give the demo a try. It's 
feature unlimited and will allow you to explore it to your hearts 
content. Also the FAQ will provide you with solutions should you 
encounter any issues during setup.

Best regards, 
Felix