Thanks for the reply MattF. Shotscope did get back to me in 48hrs but with the suggested re-set and re-boot from the website instructions.
Although I had completed these steps several times already without success, I followed them again but this time went a step further. The very misleading part of these instructions (which are on the website), is the phrase "Complete on boarding'.
As I was not sure the watch was working, I had not 'Set up my Bag' with the tags and therefore did not want to proceed beyond this stage. As the phrase "Complete onboarding' didn't mean anything to me (or prossibly anyone else, other than in recruitment terms) I had not gone beyond the 'Tags' section of set-up. Now having done this (without setting up any tags for my bag) the watch appears to be working OK, although I have yet to check with GPS and course finding, etc.
I would strongly suggest the phrase 'on boarding' is further clarified in Shotscope instructions and comments made about going beyond the tags section in set-up.