Hello, I am installing my site with new mods, so I have
mysite in 1.3.8a
and mysite with new mods always in 1.3.8a

when I finished with the install of all mods I need to insert in new site all my products and all clients and orders?

It is possible?
products I can insert with easy populate.

But for client and orders Can I insert old clients in new site?
I have this question because maybe with new mods it creates new tables of database, so how can I do?

I had to install a new clean version because the old it gives to me some problems.

Thank you