I created a new profile on my PC and Just moved the files over and it fixed the issue(The Pluto Luncher had to re-download). Try redownloading Piry.exe on the new profile as well if converting files over doesn't work but as I said creating a brand new administrative profile on my PC stopped that error message from occurring before launch.
PS: Xerxes is correct Matrix , the Plutonium.exe location doesn't matter in this instance. I'm not aware of the exact problem but because of the current resolution, having it be that a new profile was required I would have to make the assumption that the problem lies somewhere in the installation process. Maybe a file was missplaced or AntiVirus Blocked something the first time around I'm not exactly sure but what I do know is a fix that worked for me.