27 version is getting worse

i`m working for 25 years with corel - the last really good version was X8! The Jarvis foresight doesn`t work any more. With the latest Version 27 the retouching tools in Paint — like clone, blur, and motion blur — don’t work at all anymore when switching to Corel Paint, the preview pane no longer shows anything.

Can I go back to older versions and install them, even though I have a subscription?

I`m doing seminars in Corel and I can`t do them anymore!