on windows 10 pro 64 bit

Another reason not to use Edge.

Under the "per application" tab in the "Windowblinds config", add Edge.exe...you'll be asked to navigate to that program.

Should solve the problem.

I tried that but it doesn't seem to work or i'm doing something wrong

After excluding Edge, did you reapply the Windowblinds skin?

Well, you can submit a ticket to support... https://esupport.stardock.com/

Keep the 'auto-reply'(has your case number) and don't reply to it. Wait until a person answers you. Might be Monday or Tuesday before you get an answer.

Include with your request for help the specs of your computer (processor, RAM, graphics card, etc.).

FWIW, Edge is a Metro/Modern/Universal/Windows App and won't ever be skinned.
Does Internet Explorer run as expected (while skinned) ?

where do you find edge all I find is  internet explorer

"Edge" is the default web browser for Windows 10.  Internet Explorer is the secondary option.

I believe it is located here - C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe

You may need to enable show hidden files to find it.

thank you I found it where it said it was , windows edge still takes a long time to open

WindowBlinds does not skin edge and excluding it will have no impact what so ever.

Exactly what is slow?