Can't get save page as png to work #1

Hi dude, I didn't know the best way to contact you here about the addins for SumatraPDF, I tried to follow on everything you said about ExportPng, I created the cmd, downloaded and placed mutools on the appropriate place and even did the sumatrapdf-settings fixes for external viewer and still nothing happens after the cmd closes, think you could help me out and explain it to me? What I've been doing is copying pages and pasting on a private discord server's channel and then manually donwloading it to my drive but I felt like your addins idea was better, yet I can't seem to set it up at all, I would really appreciate a hand! Thanks for your attention :)