I have a problem with Hardops/Boxcutter bundle i"ve bought few weeks ago.
Everything was fine, smooth - addons were working as they should.
But today i launched Blender 2.80 and after activating BoxCutter (Alt+W) there is no Toolbat of this addon showing on the top of the window - just gone missing - nthing was changed, it was like POOF.
Reinstalled Blender, Addons etc - nothing helped.
I know it could be used somehow without it but its the matter or principle.
As per images you can see that when i TURN on the Addon via Shortcut there is no Toolbar of addon and in addition i get second panel for transformation.
Yes exactly i have BoxCutter added and checked as Active, saved in preferences.
I do see Addon Sidebar on the right as you have on the picture but not on top as you do have. That top one is missing for me