Hi there!
Sorry to hear about the trouble you are facing there.
Regarding the recent security issues, we released security patches as soon as the vulnerability was identified and published detailed guidance for all affected users on how to secure their websites. We strongly recommend that users apply the patch or update to the latest version as soon as possible.
Please check the details of the blog post.
https://www.joomshaper.com/blog/security-update-for-joomla-3-users
There were several featured forum posts published as soon as we identified the security issues and released the corresponding updates for SP Page Builder, Helix3, and Helix Ultimate.
https://www.joomshaper.com/forum
The blog post was published later, after we decided to release security patches for Joomla 3 users as well, even though Joomla 3 has been end-of-life and unsupported for quite some time. That's why the blog post title specifically highlights Joomla 3.
However, if you read the full article, you'll also find information relevant to the latest supported Joomla versions and the corresponding security updates.
I hope this clarifies the reason behind the blog post title.
Best regards,