Edit Anything with 010 Editor, the Professional Text/Hex Editor
SweetScape Knowledgebase KB1007: How do I stop long operations in 010 Editor?
Almost all long operations (find, compare, templates, scripts, etc.) will
display a progress bar at the bottom of the application after they have
been running for a while. To stop the operation, press the 'Esc' key on the
keyboard.