I am not sure why but Notepad ++ will load up even though it is a standalone software. It was working and why it stopped I have NO idea. Here is what I see when I try run it.
Does NOT make sense to me. On my Windows 10 PC, it works fine.
I only know Windows 7, however, I think Control Panel / Default Programs / associate a file type or protocol with a program, should do the trick. Sometimes, but not always, Control Panel / Set Default Programs / Set this program to default and/or Choose [all has been my choice most of the time] Defaults for this program works very well.
My Computer
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Antec desktop; Acer Aspire laptops
OS
Windows 7 Professional 64-bit
CPU
Desktop i5; Acers i5 & i7
Memory
desktop 16GB; 1 Acer 8GB & 1 Acer 16GB
Hard Drives
1TB split into 2 equal partitions [OS and data] usable by RJS
Internet Speed
AT&T DSL
Browser
FF, GChrome, msIE
Other Info
Windows 7 Firewall, Emsisoft AM/AV, MSE [scan-only], SpywareBlaster, Ruiware/BillP combine