Don’t worry, both Stacks 3 and Stacks 4 are Catalina compatible. In fact all our plugins are.
There is absolutely nothing to buy to get Catalina compatible.
If you already own a license to Stacks 4 then just go to the Stacks page, click the big Download button, and follow the installation instructions, and you’re good to go.
If you’re still using Stacks 3, that’s OK too. At the bottom of every page on our site is a link to our plugin archive of all the older versions. Just click through to the Stacks archive page and download the latest Stacks 3. I think it’s v3.6.8 – it’s Catalina compatible too.
And just to be clear, we will never charge a fee just to fix bugs or make our software work with the latest OS.
Stacks is made by me and my wife. That’s it. And just like you we hate companies that pull sleazy stuff like that. Since Stacks launched 11 years ago we’ve charged only three times, and always when we added a ton of new features.
Make sure to update any of our other plugins too. Yep. All free updates for Catalina.