You may contact us for any reason - reporting a bug, making a suggestion or leaving a comment - by submitting a ticket at Help Desk. There you may provide your name and email address so that we can respond as quickly as possible.
At this time no direct contact email address is provided, due to security concerns. On the other hand, we assure you that your email address will never be used for any other purpose than responding to you.
A selection of online video tutorials exist at Tutorials that cover different aspects of Deriscope usage.
It is likely that your question is already answered in Knowledge Base. Please have a look there before you submit a ticket.
A small selection of technical papers is available at Papers for download.