Welcome to X-Cart! Please start by reading the following thread, which will help you get started and hopefully make your experience here a positive one:
http://forum.x-cart.com/showthread.php?t=23970
Please note that this link is not an answer to your question, but we need you to update your signature with your X-Cart version so that we can answer your question correctly.
As far as encrypted files, X-Cart doesn't contain any. You sure you aren't viewing them with the wrong software?