When using multiple shared parameter (SP) files, it is very inconvenient to switch between them. For example, to add a SP to a family from another SP file you need:
go to > "Family Types" dialog box> press [New parameter] button > "Parameter Properties" > [Select…] > "Shared Parameters " > [Edit] > "Edit Shared Parameters" > [Browse] > select another SP file > [Open] > [OK] > select SP > [OK].
Repeat if you need to switch back. The same steps need to be done if you need to add SP to the project or export it.
Idea: Simplify the use of multiple SP files by adding a drop-down list of recent SP files to the Shared Parameters dialog box. See image below:
SP files drop-down