After reintalling windows i have lost my licence key. I have no idea witch email a have use when i bought Nexus Ultimate. Is there a way to get new licence key witchout buying it again ??

I couldn't find your email address on the registrations database, and looking up your last name (based on your current email address) I could only find a Nexus Ultimate purchase that was made back in 2012. Was that you?

If so I strongly advise you to renew your upgrade subscription, no need to buy a brand new license at full price.

What is your first name?

Either way, since this will involve personal details, it would be better to handle this by email via Winstep support. Please email me at Winstep support with your data.