What project did you do the modifications in. When you open the VBE you
should see the project explorer on the left hand side. If not then Select
View | Project Explorer. The VBE code must have been written in a project.
That project could be your personal workbook, a standard workbook or an
addin. Depending on what the project was will tell you where the code resides.
There is a .xlb file on your computer that stores customizations to your
toolbars but I don't think that is what you are looking for.