Hmm. Intel only. Beta only. For "OS X Mountain Lion, Mavericks & Yosemite" only. And: "Known issues:
• Previews sometimes don't show up immediately (wait a few seconds).
• Some preferences are not working at all.
• No option to show minimized windows yet.
- -> I'd say to avoid unless you're into experimenting on an Intel Mac.
Not Ready For Prime Time.
If you are still bothered by the incorrect expiration prompt, you can fix it with the following methods
https://github.com/qzz0518/remove-HyperSwitch-expired-dialog
The functionality of HyperSwitch can be sort of replicated with BetterTouchTool. It's not a perfect replication, but it's a way to get around the HyperSwitch expiration problem. (And I think everyone can benefit from running BetterTouchTool.)
Beta expired on June 26 2021. No point in installing it as it just quits. Update says it's the latest version. Contacted developer twice - by email and on site customer service form. No response. Too bad. It was a great app.