Well its a custom OS, and the build and version the custom OS are build to will stay at that build like Altum Pro will stay at 1607 but will get all the security and updates of softwares. But won't upgrade to new version like 1703, 1709... and so on.i was about to ask the same question have you tried to update it?
use the torrent then coz mega isnt coming back..why MGEA link says it removed ??? any new link?