Hello everyone, in new version of mikrotik a.k.a. 39.1 I cant find a detailed changelog. Please can you update a Changelog’s page on wiki ?
Look here: https://mikrotik.com/download/changelogs
Edit: Oops, not for The Dude.. 
Campano, Dude v6 change log is on the following URL: dude v6.xx changelog. But currently no changes for Dude v.6.39 listed there.
Forum topic - The Dude, v6.39rc test builds:
Changes in v6.39rc7:
*) Fixed - Tool fetch didn’t work with notification - execute on server
*) Fixed - Link type speed was not recognised
*) Fixed - Charts made some strange peaks
*) Added - Right click tool option under Devices → RouterOS → simple queues
*) Fixed - Broken Simple queue edit/delete feature
*) Fixed - Dude showed only part of all Simple queue
Fri Jan 13, 2017 1:46 pm - #30
Changes up to v6.39rc12:
*) Fixed - Submap icon wasn’t placed on map if “New Map” option was used.
*) Fixed - Custom tool wasn’t accessible from Devices-> List
*) Fixed - Device → RouterOS didn’t show interfaces in interface dropdown list
*) Fixed - Error was displayed when tried to edit multiple simlpe queues
Tue Jan 17, 2017 9:16 am - #45
Changes in v6.39rc13:
*) Fixed - winbox/webfig ping probe used retry interval in retry count field.
Wed Jan 25, 2017 10:13 am - #69
Changes in v6.39rc17:
*) Fixed - wireless registration table didn’t show values in all fields.
*) Fixed - Device tree notification system were not working properly.
*) Fixed - Client started from shortcut with added arguments tried to use 2210/2211 ports