Locating Edit Link from an AddinFile

I often email myself end of day a file from a work computer to then be able to continue that work at home.

My work PC has an Addin file I created a while back with various scripts and functions.

This morning when I opened my (macro enabled) excel workbook, the file is looking to link back to that Addin file that I do not have on this computer currently.

I could break the link, but would like to find where that link is located to learn how it happened in the first place.

So far I have tried the following but have not found it.

1. Viewed and searched all formulas.
2. Checked all the scripts and having nothing trying to call back to the addin file.
3. Checked all named ranges.

Any other thoughts on where to try and find it?