I Made Upgrade7.1.1 but after reboot router RB1100 ahx4 Dude the Software id changed and level 0 and tell me router closed after 24 hours, my router RB1100 AHX4 DUDE EDITION AND LEVEL 6 ,PLEASE I NEED RESOLVE FOR THIS PROBLEM.
Why did you upgrade to 7.1.1 if there's been 7.1.2 released for days? Try to upgrade to 7.1.2 it includes fix for lost license maybe it can help you otherwise you should email Mikrotik support...