I can't find information on how upgrades are released. We are testing out v17 since it was the one provided from the download link, but I see that v18 and v19 are also available but I can't upgrade to them. I assume we need to be an "Early Access" church? Are v18 and v19 production ready? This page appears to show that 19.1 is what I should be running: https://community.rockrms.com/release-timeline, but I can't seem to get upgraded to it.