Picocrypt 1.17 introduces support for multiple keyfiles, as well as a unique "Require correct order" feature for keyfiles. The UI is not the best but stick with it while I rewrite Picocrypt from scratch to incorporate a better UI. This release is stable, although it is not compatible with v1.16. Enjoy!
Windows: Picocrypt.exe
macOS: Picocrypt.app.zip
Linux: snap install picocrypt