I sent you last week a tweet about my misadventures with your Content Copier Plugin. My apologies, there was no need to be so rude. But I was even more disappointed that I couldn't give a proper review on your plugin's page. We can see 5 stars but actually nobody but you decided of it.
About your plugin now.
When I select a category to copy content from and then clic on "filter" a box appears and ask to add at least one item to the list. So I have to add first a random post in my list to make the filter function work.
Now that I can filter by a specific category, I have 500 posts to copy. But the plugin only allows to show ten posts. So I can add those first posts, and then have to go through the 50 remaining pages to get my content copied. However it's already a pain to do this, when I clic on the second page of post, the category filter goes away and make my task undoable with your plugin.
Have you ever tried it?
I tried to copy the 10 first posts, but actually it doesn't copy the tags, neither the categories that were attached to them.
I have found out that the original wordpress tool for exporting/importing posts was better for this task.
Now that I took some time to give you my feedback I hope you will consider a refund or offer the next plugin I will try from your platform.
By the way, I don't understand the need to install the WPMU Dev plugin before installing the plugin I bought. I also have found that wasn't fair. Even more when you have so many issues on a plugin that you sell.