Ever since the W10 anniversary update I've had an issue with menus being 'missing'. I would click on them and nothing would appear. This affects some fly-out menus added to the start menu, and similar menus added to the taskbar.
I've recently realised this is a Windowblinds problem and the menus do appear, it's just that they are transparent. When I uninstall Windowblinds, the menus behave normally.
The menus did show when there is a window open on the desktop but the latest beta has broken that.
First image:

You can see where the menu is from the shadow.
Image 2:

Taskbar toolbar for 'Programs'. You can see the shadow of the menu on the top of the taskbar.
Image 3:

A different menu with no skin applied. Same issue. Only when Windowblinds is uninstalled does this menu show.
For me, this makes my system unusable. Those fly-out program menus are the only thing to me which makes w10 (and/or W7, Vista) user friendly. I hate the post XP start menu and its clickfest.
At the moment I'm having to live with Windowblinds uninstalled. Any help would be appreciated.