If you are still having issues with opening.bat files on a 64bit, computer this might be a fix.
I ran in to an issue when using some legacy .bat.exe application this resolved my issues.
Copy your .bat files to the x86 program files.
Right click your .bat file and select to create a shortcut
Create a folder on your Desktop or C:\drive and added your .bat file and the newly created x86 shortcut.
THis will allow the .bat file to use x86 directory for .bat execution
Example:
"C:\Program Files (x86)\v2.0 mod\v2.0 mod.bat"