I'm the original author of AxCrypt. There's a new compatible iteration of it based on the original cryptography code called Xecrets, with several components. Xecrets Cli is the main fully featured command line engine, free open source GPL on https://github.com/xecrets/xecrets-cli . Xecrets Ez is a simple GUI frontend, single executable, portable. Runs on Linux, macOS and Windows. There are several more components available as nuget packages.