We want to thank you for your patience while we worked to make Camtasia work with 4k. We are pleased to announce that we have just released our newest, most powerful version of Camtasia yet. This Camtasia release will allow you create and work with 4k content. It requires a powerful machine, so I suggest you check out this support article and then try for yourself.
You can buy Camtasia here or download the trial here.
Please feel free to post your feedback and feature requests here in our Community forums and remember, all technical support-related inquiries should be directed to our dedicated Technical Support team at https://support.techsmith.com/
Senior Software Engineer