Welcome to the forum!
Upgraded from 0.41? Wow, it might take some research on that. Can you explain exactly what the filter does? Does it just apply an outline? Or does it put kind of a shadow on the edges?
Once we can understand what it does, we can either suggest a newer filter which does the same thing, or maybe even help you draw the effect yourself.
Or if you might happen to still have an SVG file, with that filter applied to something in that file, we can tell you how to install the filter, and then it will always be available, no matter which version you're using.