Permission Issue: .txt file needs open in notepad ++

I have a .txt file that i moved from an old laptop to my new computer. I can open the .txt in notepad but i need to be able to open it in Notepad ++. When I try to open in Notepad ++ I get the following error message.

"You do not have permission to open this file. Please contact your administrator to obtain permission."

Anyone know of a fix for this?

Thanks