mysqli error using mega pro filter

I have installed the megapro filter along with the mega vehicle filter and all loaded good, but when I use the extention on my website I get the following error

Fatal error: Uncaught exception 'Exception' with message 'Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INNER JOIN `prostar_product_to_store` AS `p2s` ON `p2s`.`product_i' at line 2<br />Error No: 1064<br />SELECT COUNT(DISTINCT `product_id`) AS `total` FROM( INNER JOIN `prostar_product_to_store` AS `p2s` ON `p2s`.`product_id` = `p`.`product_id` AND `p2s`.`store_id` = 0 INNER JOIN `prostar_product_to_mfv` AS `p2mfv` ON `p2mfv`.`product_id` = `p`.`product_id` AND `p2mfv`.`mfilter_vehicle_make_id` = 1 SELECT COUNT(DISTINCT `product_id`) AS `total` FROM(SELECT DISTINCT `p`.`product_id` FROM prostar_product p LEFT JOIN prostar_product_description pd ON (p.product_id = pd.product_id) LEFT JOIN prostar_product_to_store p2s ON (p.product_id = p2s.product_id) INNER JOIN `prostar_product_to_mfv` AS `p2mfv` ON `p2mfv`.`product_id` = `p`.`product_id` AND `p2mfv`.` in /home3/prostar/public_html/parts/system/library/db/mysqli.php on line 40

Can anyone help me out on this?
my testing site is http://www.prostarautoparts.com/parts

It's unlikely anyone here will be able to assist with a commercial extension. You should contact the developer of the extension for support.

Hi I have the exact same error!!!
I have emailed for support, but did you ever find out the solution??

seemengly not, his shop page still displays the same error.
But:
Unknown column 'product_id' in 'field list'
means, that no product_id COLUMN can be found
in the DB oc_product Table, as it looks, for what reason ever
http://prostarautoparts.com/parts/index ... [946,2000]
Ernie

Ok, for anyone else who gets this error, I managed to randomly fix it by setting gzip compression to 0 in the admin side. My host enabled gzip compression some other way. It seems I am still benefiting from gzip according to checkgzipcompression.com