Tools for Mikrotik devices
The universal jailbreak tool is available in "exploit-backup". This tool supports versions 2.9.8 to 6.41rc56. To use it, download the folder and launch exploit_full.sh.
The current version of the stand-alone jailbreak and password recovery tool is available from: http://02.lv/f/2018/01/06/MT_JB_0.92.ova. This tool supports all current versions including 6.41+. Please note that updating your device at any point after the jailbreak might make it unstable or brick it.
How-to on slide Nr.59: http://kirils.org/slides/2017-09-15_prez_15_MT_Balccon_pub.pdf