Change 1000+ of WordPress Featured Images in 5 Minutes! › Forums › Questions and Answers › Purchase upgrade but plugin states licence is now "inactive!" › Reply To: Purchase upgrade but plugin states licence is now "inactive!"
Your current license is active for http://new.englishmartyrs.co.uk/ (mind the different subdomain name). You purchased a Single Site license so it can not be activated on further servers.
If you want to use the license key on the other server please deactivate it on the current server and then activate it on the other server.