Corrupt .things file. Need LightwaveRF device id

Not sure how it happened, but my OH2 instance wasn’t working at all. I noticed in the log file that the things file had become corrupt and and new one had been created. The new things file appeared to be empty.
I had been meaning to do a rebuild of OH2 as i had foolishly been using the production instance as a bit of a play pen, so off i started - and all is looking good, clean and simple.

Apart from 1 device. I have a Lightwave RF wall switch, but i don’t know what the device ID is.
Is there any way of finding this from the old OH2 files i have from the now corrupt instance??

Thanks, Col

Any ideas anyone?