Hello, I installed the CHR v7.2.3 from the ISO downloaded, everithing was good, but I cannot register it The license menu looks like this
You don't need to register the free version tho be aware it's limited to only 1Mbs. This usually is good enough if you just want to test the functionality (like with GNS3). When you are satisfied with the function tests and want to perform some performance tests, you may request a 60-day test license with unlimited speed.
If you plane to make copies using snapshots (vmware/hyper-v), remember to run "/system license generate-new-id" on the new copy before requesting a new license.
For more details, have a look at:
help.mikrotik.com - Cloud Hosted Router (CHR) - CHR Licensing