Issue happened for me today. I had the downloaded plutonium.exe file from the internet placed in my \AppData\Local\Plutonium folder after I first installed it for personal convenience. I placed that file to another directory and then ran the plutonium.exe file from there and it worked. Maybe new updates cause issues if you put the plutonium.exe file within the launcher's created \AppData\Local\Plutonium directory?

Issue happened for me today. I had the downloaded plutonium.exe file from the internet placed in my \AppData\Local\Plutonium folder after I first installed it for personal convenience. I placed that file to another directory and then ran the plutonium.exe file from there and it worked. Maybe new updates cause issues if you put the plutonium.exe file within the launcher's created \AppData\Local\Plutonium directory?