Done in v5.0.

Fixed in v5.0.

Should be fixed in v5.0.

Perhaps this is related to what you're trying to achieve:
http://rammichael.com/getting-brighter-colors-in-windows-10

No, please see:
http://tweaker.userecho.com/topic/161629-add-displayfusion-support/

Title bars are currently beyond the scope of 7+ Taskbar Twaaker, which is about taskbar tweaks.

Fixed in v4.5.10.11 beta.

OK, let me know if you manage to reproduce it.

I'm not able to reproduce it. Could you please provide a screenshot to clarify what you mean? Which balloon messages are you referring to? How it is different from the stable version?