yesterday rb 133 stopped fuctioning even its disappeard from winbox i connect by cable console and found demo expaired ,howcome! after many searching saying that LICENSE key expaired. reinstall os allpackage 2.9.51 by netinstall as said in mikrotik. now i can see and inter the rb by win box but its 24 hours LICENSE why how can get my LICENSE key back
just apply the old key, it’s in your mikrotik.com account probably
to avoid this in the future, upgrade the bootloader of Rb133
sorry iam new on this where to apply for my key
log into www.mikrotik.com where all your keys are
copy the key that has the same SoftID as you see in your router
paste this key into your router
before i reinstall os i copy this from netinstall “K9MF-3TT key:
u6u/+7+3TOZ+bvd2hL69/DYt/7v807//v6f+rPdv9+1/nfp1wjb//v0/////ETs/17v/C5s//n///27r
fW/93A==” is this the key
this one should be correct:
-----BEGIN MIKROTIK SOFTWARE KEY------------
u6Ok+7ckSMYWLidwgKYd7DYt+LN4Ur3juidqDHZvE815
FaBwwgaduvU/H/HxESsvU7vQA4sv5h/vdi6jVGvJ1A==
-----END MIKROTIK SOFTWARE KEY--------------
copy it, and paste it into any level of menu when connected with Telnet. Or connect with winbox and use Paste Key button in License menu.
i try copy past but its says cannt change key invalid key
thank u very mush really u r a life server and made by mt 
Hi,
I have some old RB133c,
I wanted to update to higher version (was 2.9.51),
and after putting 3.30 (for key change),
now it says DEMO … 24h key …
can you help please, I want it working again …
KEY: 6VBD-AAKY ; RB-133c (3x mini-pci)
thanx in advance.
b.r.
Alex