Version 9.0.3.279, Win 10
Batch rename causes freeze.
Forced quit required.
Repeatable - happens EVERY time.
Uninstall/reinstall does not resolve.

Other bugs in current version
- cannot select first image in a stack when stack is collapsed.
- not all subfolders visible (view set to show folders/hidden/reject files) some folders are visible, sometimes. Not dependent on number of images/folders (ie. not excessive quantity of files) All become visible when "show items from subfolders" checked, though obviously also showing everything in folders also!.