HI Logan,
ExcelDnaPack is a console program.
From a command prompt, cd into the directory where the ExcelDnaPack.exe lives.
Then in that directory, type in:
ExcelDnaPack c:\Projects\Myaddin\bin\debug\Myaddin.dna
(don't put "Start ..." or anything)
where the path to the .dna file is replaced by whatever the path is to your output files.
(I guess you need quotes around the path if there are spaces)
-Govert