How can I change Management freeware on an network and retain settings?

Hi there!
I have been using PRTG freeware for managing my networks in my small internet business. I have realized that the freeware has got some loopholes and people are able to share the internet beyond the provided one computer per connection. Is there a way to change management freeware and introduce another one without loosing the previous settings or I will have to set up everything afresh? Thanks.
