I wanted to share this here (and primarily will be more active on the Github repository with these things), but I think I may have figured out what happened with your system: https://github.com/thearchivalone/BRS-PSP-Research-Initiative/issues/18
If you run BRS-Extract.ps1 with Powershell 5 instead of 7 (the latest version), Windows thinks it's Mac OSX and downloads the wrong tools and binaries. I would recommend deleting the Tools folder, downloading the latest stable release of Powershell (see here: https://learn.microsoft.com/en-us/powershell/scripting/install/installing-powers...), and running the script from it first. If you want to work with the QuickBMS scripts (must run from the command line due the user interface not working with custom scripts out of the box), feel free to mess around with them on the last release instead: https://github.com/thearchivalone/BRS-PSP-Research-Initiative/releases/tag/Miles... . The current code is a bit unstable and loose due to heavily working on implementing a build system and porting the scripts over. I also will take QuickBMS script Pull Requests there if they are fixes or improvements to what's currently there but am not going to actively improve them otherwise. The framework is still solid for basic modding, hacking and extracting but the limitations are very real once you want to do heavily advanced things.