Do you know if it is a newer version then the one they released last week? I posted earlier that there is a error in this when it comes to products with options. I informed x-cart who thanked me and said they would get my info to their design team to fix it. What it does is adds your options and then deletes the choices because after each option they have it then do ao delete command so it adds then deletes till the very end leaving you with only 1 complete option. I had to do the sql dump and manually fix the sql file to fix this problem that was contained in it. Only took 2 days of work and 5 re-installs to get it all figured out.
My post on this subject is here as well as what I did to get around this problem. As said this was with products with options.
http://forum.x-cart.com/viewtopic.php?t=11999&highlight=