There’s a lot of parts listed in my Capture Design Cache and most of the paths aren’t paths that exist on my computer. Is there a way to change the paths?
The Design Cache is essentially a library of parts that have historically been placed or modified within your design. The paths you see listed in there are simply pointers to where the part originated. The path listed does not define where future parts will come from nor will Capture attempt to access those paths.
To change those paths, you can use the Replace Cache function within Capture. See the Capture Help documentation for this functionality.