The answer is probably no, but does anyone know if there is a way to export the logbook, or open it in another format like Excel?

Try FSX Logbook Editor. No idea if you can export the data, but cut-and-paste might work. Cheers, - jahman.

Lamont Clark's FSX Log Book Editor v0.2 will export data and import data. You can get it in the Avsim Library FSX Utilities section.