Ribbon Customization - Unable to Edit Using Custom UI Editor

[caddcop]

To clarify, I have migrated a Personal Workbook with macros from a previous job to my current position almost two years ago. As part of that migration, I discovered the Custom UI Editor as my toolbars from my pre-ribbon workbook needed to be replaced. I know my macros are in the workbook, but I am no longer convinced by Ribbon Customizations are in there as well. I can see them in the customize ribbon dialog box, but if I try opening my workbook in the UI Editor, there are no customizations displayed.
So my real question is, this: Is Office 365 saving my Ribbon customizations somewhere else and if so where. I wanted to import some custom icons using the UI Editor along with other tasks, but since I can't seem to even confirm where the custom ribbon items are, I am not sure what to do.
I even renamed my personal workbook to .zip and examined the content as a compressed folder and found no evidence of any custom UI entries that we described in some online pages. I work with a lot of XML files so I am very comfortable looking at them and following their contents, which is why I like the custom UI editor as it allows me to work with XML files directly and handles all the file and folder manipulation for me.

[rorya]

Unless you customised the ribbon using the CustomUI editor, there won't be anything there. If you did it manually in Excel, they are stored in the Excel.OfficeUI file.

[caddcop]

Thanks. I was not able to learn that tidbit via a number of Google Searches. It had been so long since I created the customizations that I just assumed I used the Custom UI tool as I have on other spreadsheets. Since my personal workbook loads on start for my macros, I figured I must have added those customizations to it. But I was wrong and you were correct. I gave you an Excel Forum thumbs up.

[rorya]

If you use the CustomUI with a hidden workbook (such as the personal macro workbook) that is not an add-in, the customisations don't show up anyway.