Your catalogs will not be deleted if you delete the prior versions of the program (unless you have placed your catalogs in an unorthodox special location).
To find where your catalogs are located, do a search of your computer for files named catalog.pse. This is only part of the file name, so you should come up with a number of files with names such as catalog.pse13db. These database files are found in a folder with the names of your catalogs. The folder contains the entire contents of your catalogs (but not the photo/video files).
