I had the same problem and created a python script and exe for this. You just drop it into the folder that you want each file to be sorted randomly. It will add a prefix to each file e.g.: '_1file.txt' and you can reverse this with the exe. Just remember to sort your files alphabetically in the folder with Windows. I hope you find it useful.

p.s. it will only do this to files, not folders.

p.s.p.s.: it creates a csv file to keep track of the original file names. If you delete the csv file by accident it is not the end of the world, the exe can still rename everything back to normal, but it is recommended to not delete the csv file it creates.

Here’s a link to the exe for easiest use: https://github.com/AutomationsByAuto/FileRandomizer/releases/tag/v1.0.0