I am having problems ejecting my USB drive after using PortableApps. If I insert the USB drive, do a few file copies from File Explorer, then eject the drive, all works fine. But if I launch PortableApps, shutdown PortableApps, then try to eject the drive, it tells me that there are files open on the drive. I've checked in Resource Monitor and I cannot see any files open on my USB drive but it still won't eject. I am using version 21.2.2 of the platform which I believe is the most up to date. Any suggestions as to what is causing my problem. Also, I have tried the USB drive on a couple of different Windows 10 PC's.