"“browse folder for reapeak”s or “create RT list or RD list” Reaper hangs and crashes."
You shouldn't need to batch create the reapeaks it should do it as you go, it's just a bit quick if you have the peaks already, but I think you just browse for the RealTracks then Drums folder then it should scan all sub directories and create reapeak files for the audio file type you are using that it is set to in the dropdown.
The create list you can do that manually by clicking the button in the RT and RD pickers, the Copy List button at the "Copy List" bottom of RT & RD picker windows, the text file will save to c:\bb\Data\RealTracksList.txt c:\bb\Data\RealDrumsList.txt or whatever drive you have BB set on in the injector settings tab.
It probably freezes because the little notice that BB gives to say it's finished creating the txt file list goes behind the picker window as it will take a while to create the list.
Remember you can end task autohotkey that is running in the system tray if you get a lockup.

**Make sure you have all the tracks showing with no filters set so you get a complete list of tracks and drums.

https://stash.reaper.fm/u/ReaTrak (Scripts for Biab Reaper)
Open SGU in Reaper Instantly