Bad Reviews/Is this plugin free?

Hi All,

First time pretty much asking a question in WP forums.
I saw for this Rich Text Editor a couple of bad reviews. I design websites so take those with a grain of salt as novices may be impatient with any wait times.

The other “problem” I saw was that some felt as if the plug in just stopped working and they thought it might be a paid/premium plug in and not free so before I get used to the features I just want that confirmed.

So far it is really nice. I was using a similar “CMS” that had a “Layer” option built in and that disappeared so I was really happy to see this installed along with other time saving features for customization.

Anyone who knows for sure and especially the developers should chime in to confirm if:

~~~~this plug in is free
and
~~~~if I can install it on sites I am creating for clients.
This stuff is important for all legal reasons so looking forward to the reply.
Glo

https://www.ads-software.com/plugins/richtexteditor/