Hi there a while back I bought the game, game dev tycoon. I recently got back into the game, and whenever I load up the game it has an update message. Apparently the only way to update non-steam is to re-download. I don’t have the email anymore since I bought it early 2013, and it’s now mid 2014. Can I ask for a new email; do I need evidence? I have absolutely no idea what email I purchased the game from. Any help would be great! 
As per our update page:
To download the latest version please re-use the download link in your original purchase email.
If you have trouble finding it search for an email from mailer@fastspring.com. If you cannot find your email contact orders@fastspring.com.
So, if you can’t locate the email, contact orders@fastspring.com and provide details to enable fastspring to identify your order (name, email, address etc.)
How many emails do you have? XD
Try and search the fastspring mail in every email account you got