The easiest way to install the full version of AudioLabel, is to click the download button and select "Save" from your web browser. Once the file is saved, you can double-click (or run) the file from your hard drive.
When saving the AudioLabel setup file, the default file name will be something like "audiolabel_500_full_setup.exe". You can rename the file anything you like as long as it has the ".exe" at the end.
All of the major web browsers (Chrome, Internet Explorer, and Firefox) have different options when saving a download file. There are also a bunch of web browser plugins (like anti-virus software) that can make things act funny. Simply using a different web browser can change things.
When downloading the full version of AudioLabel, you are visiting PHP webpage that returns an executable file (*.exe), so you are not really downloading a PHP file. However, you do need to use a web browser to download the full version of AudioLabel.
If you still have problems:
1. What web browser and version are you using to download AudioLabel?
2. Does your web browser have any anti-virus software that might be blocking the download. If so, what anti-virus software are you using?