It appears as though the small icons taskbar mode was adjusted a little too much, now there is a gap between the start button and the bottom of the taskbar of https://www.wincustomize.com/explore/windowblinds/2776 where before it was just a little too short:

In the previous beta the bottom of the Start button was cut off a little.

Running Windows 10 build 15063 x64.

Does not work with the windows 10 creators update ! window opens and closes after 1 sec and if I install an wba and click on the notification nothing happens

It should work fine on Windows 10 creators edition.

If you are having problems opening the window it sounds like an activation level issue.

Could you contact support directly so they can assist.

Did you uninstall, reboot and then install, or did you install directly over an existing WB install?

Did it all deinstalled rebooted my version is activated BTW I have did an upgrade from earlier build maybe that's the problem I don't know ! It has worked in the past on insiders preview but the latest 3 verisons I got into trouble with running windowblinds

ps You could be right about the activation @ my account if I check it says nothing activated for windowblinds 10

edit : Just downloaded from my account the version 10.6.0 and now it works again go figure that

same version as you ! but it is fixed with the new version of windowblinds