This is what I use to compile and run an AutoIt script.
I use Notepad++ to edit the au3 file and then use cRun.
Place cRun.exe in the "AutoIt folder" (the one that has AutoIt3.exe etc.), or in a sub-folder of the AutoIt folder.
If you think it's useful, attaching source and exe in zip.
Select a au3 file using the combo box, then click 'Compile'.
EDIT : If a ico file (with the same name) exists in the same folder as the au3 file, then cRun will use it when compiling.
i.e. if the autoit script is test.au3, the icon should be test.ico .
EDIT 2 : Update. Attached 20200625_cRun.zip (post 2)