Yes, you can. Simply select disconnect in the Lumia Share application. When doing so, your Lumia also won't automatically connect the next time.
- What is the Lumia Video Trimmer app on Lumia phone?
- What can I do with the Lumia Video Trimmer app on my Lumia phone?
- Why can't I cut video clips exactly where I want with Lumia Video Trimmer?
- What kinds of videos can I trim on my Lumia phone?
- Where can I find the trimmed and saved video clips on my Lumia?