I have only installed the snapshot binding.
I believe the development option is only used when working with Chris to troubleshoot an issue where he makes a binding outside the normal build system. Since there currently is no such version, the script times out.
If you do not show a zwave binding installed you may need to choose the Snapshot binding again.
How is that a year old? 2.5 did not exist a year ago and the version starts with 2019. Here is the version in installed yesterday, IIRC. 235 x Active x 80 x 184.108.40.206911020359 x openHAB Add-ons :: Bundles :: ZWave Binding
Btw, I downloaded the Zensys tool which gave me access to the USB stick and guess what: the node40 is definitely NOT stored on the stick!
Finally after I put back the USB stick to the Raspi and rebootet. It was gone. Maybe after all that stuff, I had restarted OH - who knows. I only wished I knew which of what I did above made it go away…
And finally I was able to include my switch again. I like to note at this point that out of frustration I pressed the first switch of the switch2 device really(!) fast - probably 10 times (even though 3 times needed). Fibaro doesn’t tell how quickly it should be but I get the feeling it must be subsecond. If anyone knows exactly, please share.
And, yes, finally (after a whole sunday of work) the switch works again in openhab.