The contact address for all other issues is:
If you have a question, suggestion or a bug report please write it to the forum. If you don't want to use the forum you should at least browse it and the FAQ through because the answer you are looking for might be already answered.
If you lost your license and need to get it again you can do it from here.
If you don't receive an answer to your email the reason might be that it was caught by a spam filter. In that case you should make sure that the email didn't contain any images (this includes also your signature) use plain text and not html or rtf in the email try to send it with some other email or webmail client add 'Rainlendar' to the subject line write in English (or Finnish :-)
You can follow Rainlendar's development on Twitter at: http://twitter.com/rainlendar