The following tools was produced for MicroStation V8 XM Edition to convert the Side Bar Menu files to XML to import into a DGNLib for use in your workspaces. This is so old a concept and tool that we never produced this for any further versions of MicroStation.
https://communities.bentley.com/products/microstation/m/bentley_library_utilities/138926
The side bar menu tool would no longer be supported so we would suggest moving to current technologies with storing and configuring your menus in DGNLib files within a MicroStation workspace configuration.
It would also be suggested that you should be upgrading to a currently supported version of MicroStation or PowerDraft. The older V8i versions have discontinued support after January 1st 2020. You should either be upgrading to V8i SELECTseries 10 or CONNECT Edition.
RegardsAndrew BellTechnical SupportBentley Systems