Openfire server deb upgrade

Hello,

I am runnig on debian jessie and openfire server 3.10.0

How is the best procedure to update on openfire server 3.10.1 with new deb package ?

Is enough to just dpkg -i openfire.deb or I have to stop server and backup home dir and after update rewrite date back from backedup data.

Should I again join openfire to AD domain ?

PS:

Where are all important files of openfire.

Thank you for any helps.

Best regards Filip.