The import stops and products description in missing

Hello,

I just buy your plugin.
My site is: https://shop.vivabioplafar.ro/
I try to migrate only the products and categories from Woocommerce to Shopify.
I increase the server values as can be seen in the attached image.
I connect the WOO with shopify and isOK. I try to import 23k products.

The problem:
1. The import stops after 2000 products.
2. The imported products in Shopify are missing the Description. The short description has been migrated.
3. How to import also the products attributes?

What is the problem and how to resolve this?

Many thanks

Dragos