CHR is Cloud Hosted Router, a special IMG file for virtual machines. Improvements over regular x86 from ISO file:
- free (no license) with all features
- supports hyper-v and all the drivers for various environments
- 64bit
Currently runs at 1Mbit per interface, because we will have a subscription service for around 1-2$ per month to remove this limit. There are no other limits for now (like a Level6 license).
More info:
http://forum.mikrotik.com/t/cloud-hosted-router/89979/1
http://forum.mikrotik.com/t/routeros-virtual-labs/90606/1