Please tell me there is a faster way than clicking "link" 4,500 times. Multi-link?

[cmadland]

I think you might be mistaken here. I use find/replace across multiple files all the time.

1. Immediately to the right of the ‘replace’ field is a little button that will allow you to replace all across all files.
2. In the line with the file name, you can replace all instances in only one file.
3. You can exclude a file from ‘Replace all’ with the ‘X’.