Mac ios High Sierra on iMac 21.5, AI 2019, working on simple packaging mechanical files, sometimes when saving I get a message that it cannot process. I either lose all my work, or several files have been translated into black and white and look like architectural drawings. I have trouble creating new swatches. When I duplicated a swatch, when I changed color of copy, color of original changed. Why is there no step and repeat? Please stop releasing versions of this software before it is bug-free. Most versions don't even have noticeable upgrades, others have annoying upgrades. After using software for 30 years do I need instructions to pop up? Stop eliminating. I have wasted so much time.