Hello @douglsmith , apologies for this. What you encountered was a very unfortunate bug that we have fixed months ago.
We’ve added a pinned thread on it here that includes how to update: https://wordpress.org/support/topic/update-issue-asking-to-buy-premium-read-this/
Here are the steps enumerated there:
To update, follow these steps:
1. Navigate to Plugins > Add New
2. Search for “Stackable”
3. Click on “Update Now”
Alternatively, you can deactivate Stackable plugin, then update it. Or you can manually update Stackable by downloading the v3.1.5 plugin zip file and uploading it into your site.
I 100% agree with you that the update list is not the place for any promotional stuff, and it is not my intention to add any promotional things in there. Unfortunately, we had a painful bug that showed the premium warning for free users. While we have addressed this quickly months ago, we are still sometimes seeing the effects of this.
My apologies for initially jumping to the conclusion that this was a premium advertising attempt. I have edited my original message to remove that and hopefully be more helpful to future searchers.
Thanks for the fix instructions. It’s all good now.