the option to export to EXCEL Energy Balances for multiple years of the 2024 LEAP version does not seem to function properly: only the "One" sheet exporting option is displayed in the interface.

Am I doing something wrong, is there some configuration option, or is it really a bug?

What exact version of LEAP are you using? The option to export all energy balances did not make it into LEAP2024 yet. I will try to add that back in soon. In the meantime you could write a simple VB script to do this. Try running the following in Advanced: Edit Scripts. Set ExportEveryXYears to 1 if you want to export energy balances for all years.You could save the script as "ExportEnergyBalances.VBS" if you want to use it multiple times.

Hope this helps!

Charlie