Will this be converted to 4.1 anytime soon?

I would love to try this out, but go the following error when uploading xml.
Also, please let me know how much would be cool for brand free option.
Thanks in advance!

Database error in vBulletin 4.1.5:

Invalid SQL:
INSERT INTO `microcart_product_types` SET id='1', name='Downloadable', shipping='0', downloads='1';

MySQL Error : Duplicate entry '1' for key 1
Error Number : 1062
Request Date : Friday, August 19th 2011 @ 08:06:42 PM
Error Date : Friday, August 19th 2011 @ 08:06:42 PM
Script : http://www.url.com/admincp/plugin.php?do=productimport
Referrer : http://www.url.com/admincp/plugin.php?do=productadd
IP Address : xxx
Username : xxx
Classname : vB_Database
MySQL Version : 5.0.91mm-log

I've made some progress. I successfully uploaded the files and product.

microcart shows up well in admincp, and its link shows up on actual site navbar as "e-shop", but when I click on "e-shop" I get an internal server error.

"Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request."

Are there any common mistakes that people make? Would improper upload path cause this error?

Thanks in advance!

edit:edited to clarify what I am seeing.

Can this mod be used to setup several shops on my forum for different vendors?

To bad it doesn't seem to be updated to 4.1.5

Here are my errors from microcart

Parse error: syntax error, unexpected $end in C:\wamp\www\admincp\microcart_admin.php on line 2781

and on my main forum I have these errors

( ! ) Deprecated: Assigning the return value of new by reference is deprecated in C:\wamp\www\cart.php on line 349

( ! ) Deprecated: Assigning the return value of new by reference is deprecated in C:\wamp\www\cart.php on line 2023

( ! ) Deprecated: Assigning the return value of new by reference is deprecated in C:\wamp\www\cart.php on line 2121

If I have a product/subscription that runs for 365 days with "Ability to upgrade usergroup per product", will this prompt the user(s) to renew the subscription when time is running out, and degrade their group settings if they don't?

ANY ideas/Help with these errors??

Works. Thanks!

Can ANYONE help me with my errors??

Parse error: syntax error, unexpected $end in C:\wamp\www\admincp\microcart_admin.php on line 2781

and on my main forum I have these errors

( ! ) Deprecated: Assigning the return value of new by reference is deprecated in C:\wamp\www\cart.php on line 349

( ! ) Deprecated: Assigning the return value of new by reference is deprecated in C:\wamp\www\cart.php on line 2023

( ! ) Deprecated: Assigning the return value of new by reference is deprecated in C:\wamp\www\cart.php on line 2121