Brief.
We have made a fix product_options.php after release 3.2 has been issued.
 
Description.
There was an error when you set a product's option to be shown on separate page.
 
Solution.
Please download updated version of the file from here
http://www.viart.com/downloads/product_options-3.2.zip
Then extract file product_options.php into the root folder of your shop replacing existing one.
Don't forget to make a backup copy of existing file in case something will go wrong.