Download
If you run it and get an error that mentions a missing DLL, you should install the Microsoft Visual C++ Redistributables.
There is also a changelog, in case you’re curious about what’s new in each release.
Microsoft Defender SmartScreen
As AutoPTT is a small app from “just some guy,” SmartScreen will likely warn about it being potentially unsafe. Just click “More Info” and “Run Anyway” from the dialog.
Feel free to scan the installer and/or zip file at VirusTotal. You’ll see it’s safe.
AutoPTT