Corel is the graveyard of software ...
They buy out brilliant packages from reputable companies and then turn them systematically into buggy dogs breakfasts.
When you think Corel Draw and WordPrefect used to be near (or even at) the top of the heap - now they have drifted so far off traget I cannot imagine why anyone would steal some of their products - let alone buy them.
PaintShop Pro is just another brilliant package that has died a death of a thousand cuts under Corel's stewardship.
Painter seems to be just about holding its own but I think they got the original developers to continue the work when they bought that package from MetaCreations. New versions tend to be buggy but each version seems to get one or two service packs that fix the worst of the bugs. (The classic one was in version 7 when saving your file over an existing file corrupted the image file so it couldn't be opened again!)
The KPT photoshop plugins are still being sold even though they were losing compatibility back in Photoshop 7 days and they have seen no work at all since they were bought.
Intervideo will also go the way of Corel. They have released new versions of some apps but at a rough guess I would say you are likely to be paying for a new logo with the word Corel instead of Intervideo and not much else.
My favourite was when they released a Debian based version of Linux - they struggled on through 2 versions, were completely unable to provide any technical support (because none of there tech people even knew what Linux was - let alone have an understanding) and finally gave up when so many people demanded their money back because it simply did not get through the installation process on most systems!
The quicker Corel dies the better IMHO. Put the poor beggars out of their misery and put them on welfare - they will probably be more productive