I was trying to use Diffzilla with an unsaved file. When I select Compare lines: range... I get a blank window.
SlickEdit Pro 2016 (v21.0.2.0 32-bit)
Licensed number of users: Single user
Build Date: March 09, 2017
Emulation: CUA
OS: Windows 7 x64
OS Version: 6.01.7601 Service Pack 1