Nate, good question, and I like how you asked 🙂

I think the easiest way to install curl is with this page:
http://www.confusedbycode.com/curl/#downloads

I downloaded curl-7.46.0-win64-local.msi from that page and installed it. That's all you should need because it will put curl.exe in a folder and add that folder to your PATH environment variable - so the TRIGGERcmd will be able to find it.

To test it outside of TRIGGERcmd, just open a cmd prompt and type:

Thank you @Christian-Robinson.

@tim-s, that's right - you could even just change the trigger name and change it back, and it would invalidate the bookmark URL.

@steven-canary, if your commands don't accept parameters, then whether your virtual switch is on or off, it just runs the command when you toggle the virtual switch on or off.

Or, in the SmartThings device handler code, you can remove the // in front of off(). That would make all of your virtual switches push buttons that automatically toggle themselves back off as soon you toggle them on.

// handle commands
def on() {
log.debug "Executing 'on'"
sendEvent(name:"switch",value:on)
parent.on(this)

}