As I said in my other reply, that was an issue related to a faulty update. And since v5.6.1 fixes compatibility with a Windows update which you're probably going to get soon, I suggest to update to v5.6.1.

OK, now paying closer attention to the error code, I see what the issue is. See my reply here, it should solve it:

https://rammichael.com/7-taskbar-tweaker/comment-page-17#comment-3660

See my reply here:

https://tweaker.userecho.com/communities/1/topics/860-stopped-working-when-updated-from-560-to-561

Perhaps you're using an insider build of Windows 10?

See the discussion and my reply here:

https://rammichael.com/7-taskbar-tweaker/comment-page-39#comment-10041

What do you mean? Please provide more details.

The standard menu is a Windows feature, and can be activated by holding the Shift key (7+ Taskbar Tweaker merely allows to use it without Shift). Applications are allowed to customize this menu - for example, Chrome adds items such as "New tab" and "Task manager". Unfortunately, some apps carelessly disable the menu altogether, probably not deliberately, but since the standard menu is not the default since Windows 7 it's not being noticed.

It's not in my bucket list. In fact, you're the first user to report this issue, and I can't reproduce it on my computer.

Update KB4482887 introduced an incompatibility with 7+ Taskbar Tweaker v5.6. Updating to v5.6.1 should solve the issue.

Will be available in next version (that means that you'll get the old behavior one last time in the next update, since the current version will handle the vbs).