Hey Gama, thanks for the reply.
When I did my initial search to diagnose the issue, one of the first things I found was to make sure the the Haxe SDK path was actually referenced properly in Flash Develop.
It is indeed correctly pointing to my ...
... directory, where haxelib.exe lives. That was the default directory that was created during the install.
As far as compiling goes, I can run my code fine using command prompt.
Here is what I see when loading up a working program.
Here is what I see when I run the program from within FlashDevelop. [edit] There are also "can't locate font" errors.
Here is what I see when I navigate to the directory the code is in and run it through command line.
[edit]I'm using Win10.