Hi all

I'm new to desktop central and have inherited a system (desktop central server 9, agents are version 9.1.96.w) that was installed in 2015. I believe it was working at one point. 

I do not have the password to login to the current desktop central server portal. The password reset isn't working either. The agents get installed via GPO and without a ton of digging, it looks like they're reporting to the server properly (no errors that I can find so far). 

I'm looking to purchase the latest version and have downloaded the demo to run on the same server. My question has to do with how to do the install. Can I simply upgrade the current server and agent versions? Do I need to upgrade the agents? Do I need to start from scratch? 

Any/all assistance on best way to proceed is appreciated.

Thanks in advance.