I've been coding for a few decades. My favorite language is Delphi. DIA5 is written in Delphi, which is probably why the false positive on the antivirus software, but DIA5 is clean. DIA versions 1, 2, and 3 were 16 bit character based apps. DIA4 is a 32 bit character based app that handles long file names, etc. DIA5 is a 32 bit GUI app, a little more powerful than DIA4, and easier to use for some people.
Over the years, I noticed that I repeatedly did lots of "Explorer" kinds of things, but kept starting and stopping a collection of programs in order to "get the job done". As a programmer, I needed power and flexibility and speed. I developed DIA, Does-It-All, long before Explorer, and long before object oriented programming. The concept is that you view the files in a folder and you can take actions on a file in that folder. DIA5 is a GUI application: you need the mouse more than the keyboard. It's more powerful than Explorer, and often faster. It can call your favorite text editor. The text file utilities are powerful and can handle huge files. As I personally needed a new feature, I added it. Friends have had copies for years, so it's been fairly well tested.
I've attached screenshots of the program and the Help screen.