problem with commercial modules

Hello!
I've a problem with a module that i've bought here, but it's a commercial module. Is this allowed on this forum?
I don't have the install instruction because the first developer didn't gave to me the documentation.
Thank you!

You can request support in the forum, but it's unlikely anyone will be able to help you with it if it's a commercial extension. You should really try and get in contact with the developer of the extension -- their contact info might be in the extension files, or you should ask whoever installed it to provide that information for you.

If you do request support here, please don't post any commercial code.

You may need to hire someone to fix the issue for you. If you need to find a developer, I recommend you post a request in the OpenCart "Commercial Support" forum, which is checked by a number of OpenCart developers. You can also try checking out the OpenCart "Partners" area.