There are two ways to find files by name. Both require Mode: Find files, then either clear the Find What box and put the filename you want in the In Files/Type box, or put the name in the Find What box and *.ext in the Files/Type box. Both methods work, neither is very intuitive!

Tutorials for UltraEdit text editor, UEStudio IDE, UltraCompare, and UltraSentry secure delete

Another task UltraFinder does will is finding duplicate files, see Find duplicates with UltraFinder for more details.