Windows update has rendered a purchased app unusable

After a routine Windows update, yesterday 27th March, an image editing app, Paintshop Pro no longer loads. I have run through various potential fixes suggested by Claude - according to which the problem is the MSVCR90.dll file overwritten by the Windows update. I have downloaded the old version of the file and copied it directly into the Paintshop directory, but it still doesn't load.

It's analogous to having some authority performing upgrades outside your house and destroying part of your property. Straightforward fixes really need to be provided for this sort of thing.