how do I edit this file?

I got a file that I need to modify but no matter what I do I can't seem to edit it via pico. Here's the file name:

hello.dat%7Cdisplay\=Counter%7Cft\=6%7Cmd\=5%7Cfrgb\=100;139;216%7Cdd\=A

I've tried single quotes, double quotes to no avail. Anyone know how I can pico this file?

 

 

 

 

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