APC has an Excel-based logbook that works fine (Electronic Logbook II), I recently started using it when my own files got lost (please don't ask about that). LogTen Pro is Mac-only. Excel is a Microsoft product that goes with MS computers and MS Office. If you have experience with Excel I would say use it, otherwise you are really dependent on logbook software suppliers like LogTen, and frankly I am glad I am not using the latter based on cost & fuss.

APC electronic logbooks