pls am runing os version 3.13 on my system and it not working well , pls i want to return to version 2.9. that version is very good for me , how can i do that without losing my license. thanks
To backup your license, simply log in with winbox and export it to a file. Later when reinstalling any version of RouterOS (compatible with your hardware!!!) The unique SoftwareID should be the same. You should be able to then import back your license. Furthermore, it should be kept in your mikrotik.com account, so even if you don’t have the “file” - you should be able to retrieve it anytime from your mikrotik.com account.
Consider upgrading to ver. 3.17, as our dear friends at MikroTik may have fixed a lot of problems in this new release. I hope 
To backup your router configuration, log in with WinBox, open a new terminal, enter the command “export” then right click, “Copy all” and paste the contents to a text file. A little edits to the textfile, and it will be ready to be pasted back in your router, in case configuration is lost. Paste back little by little, so that you would be able to see if there’s an error and correct it.
After upgrading to v3.17 if you still have a problem - look at the forums for solutions at the same time contact MikroTik support at their e-mail, providing a supout.rif for them.
P.s. I myself reinstalled the latest 2.9 release on two of my routers recently, in my case they ran faster than v3.15 & 3.16 - but my hardware is old x86. What’s your hardware?
pls i have follows the steps but yet it was not succesfull , pl,s can some one help me with a complete step on how to downgrade to version 2.9.51 . thanks
- upload old package to router
- type command “/system package downgrade”
pls i have upload the mikrotik version 2.9.51 and i confrim it in the mikrotik fills but when i type the comand, system package downgrade and it reboth , it still version 3.13 that is still there , pls help me out from here ,i want to use version 2.9.51. i did ur help.thanks
check the Log, what does it say?
the log say , the isdn error,fail to start ISDN msg,
also system error critical router was reboth without proper shutdown and lastly system information account user admin log in via winbox.pls what can i do to reslove this problem, ie i want to use version 2.9.51., i will appreciate your kindly solution to this problem .thank
as an alternative, you can try to reinstall with CD or Netinstall program. mark “keep old configuration” when doing it
thank you but how do i mark it , or pls what are the steps to mark it “it old”