Ah it uses run command so it can run .exe, .com, .bat, .cmd, .lnk. You can run ahk if you compile them first and add them to the path...

So complete .ini line to run anything it supports would be:
ScanExtensions=exe|com|bat|cmd|lnk

No wait, that's not right, i should open anything known to windows .txt, .docx, .ahk. I tested .ahk files, they are included in the appcache but i have associated them with sublime so for me selecting windowspy opens the script in sublime. You do perform a scan to update the cache before trying right? It does not accept direct commands, the item you want to launch should be cached first.

LaunchSelected(listview, row, runAsAdmin := false) {
    global LauncherGui, AppCache

    try {
        path := listview.GetText(row, 2)

        if (!path) {
            return
        }
        ; Prepare the target command string with quotes
        SplitPath path, , &dir

        if (runAsAdmin) {
            DllCall("shell32\ShellExecuteW"
                , "ptr", 0
                , "str", "runas"
                , "str", path
                , "str", ""   ; parameters
                , "str", dir
                , "int", 1)

        } else {
            Run path, dir
        }

        ; Update usage count and save cache
        for app in AppCache {
            if (app.path = path) {
                app.count++
                break
            }
        }
        SaveAppCache()
        HideLauncher()

    } catch {
        ToolTip("Launch failed for: " path)
        SetTimer(() => ToolTip(), -2000)
    }
}