Lost paper packs

Hi,

I just bought the Humble Bundle with Painter 2021 and everything installed fine except for the 4 paper packs. They're .exe files and when I open them, they go through an install process but I don't know where they're being installed and they don't show up in my papers.They also don't show up when I search my computer, other than the original download file. I've restarted my computer several times, hoping they would show up. Any suggestions?

Thanks!