Still evaluating the 30-day hosted trial version and I had a question. I think all I can do is test the simple commerce, right? To do so, the docs list the following directive:
In order for the Simple Commerce module to create purchase links that utilize PayPal’s Sandbox area instead of the real PayPal site, you need to enable the module’s debug mode. To do so, open mod.simple_commerce.php, and near the top where the class variables are defined, set $debug to TRUE.
var $debug = TRUE;
Remember to set this variable to FALSE when you wish to take your store live and route purchases to the real PayPal website.
Where do I find the mod.simple_commerce.php file to open?