Windows crash in ammntdrv.sys after mounting image

I've been trying out AOMEI Backerupper Pro 4.02 as a replacement for Acronis True Image, and everything looked fine for the first two weeks. But now when I try to Explore my largest data partition backup which has 2 incremental backups, Windows crashes in ammntdrv.sys immediately after Backerupper successfully mounts the image. Explore worked fine when there was one incremental backup. Everything is still fine when I Explore the other backups on the drive that are smaller and have only one increment. The problem backup is reported as 100% ok when I have Backerupper check it. I even tried exploring the backup file on another system with Backerupper installed, but it gets the same crash in ammntdrv.sys (one system is Win7, the other is Win10). Any ideas?