Yes, there is a way to remove the popup that asks you if you want to move to a folder when using the Faststone Image Viewer software.
To disable this notification, follow these steps:
1. Launch Faststone Image Viewer application.
2. Click on "Settings" in the top menu bar.
3. Select "Viewing" from the left-hand side menu.
4. Uncheck the box next to "Confirm when moving or copying files".
5. Click "OK" to save the changes.
This should disable the notification that asks you if you want to move to a folder, and prevent accidentally tapping "M" twice.