Yeah, well, that was short-lived. Carlson offered maintenance on SurvCE & SurvPC for only about a year and then discontinued it because there’s no guarantee a new version will come out every year. Carlson has now gone back to a straight upgrade type program. You can follow this link then click on Request a Custom Proposal to request upgrade pricing.
If you purchased maintenance during that time feel free to send me a message and I’ll see if you’re eligible for an automatic upgrade.