Etsy Error: Product sync limit reached. Visit platycorp.com to increase your lim

I have been using this plugin for two years with no issues. now, I cant send my new listings to etsy anymore ?? I see that this plugin is open sourced.

I am getting error as always.

Etsy Error: Product sync limit reached. Visit platycorp.com to increase your limit

What is the limit? I cant find the limit anywhere in the description.

I will find another plugin that will not quit working on me or I will make my own plugin and open source it.