On DriveThru there seems to be 2 files that are labeled as 1.5 version, one file is Legends_of_Akeroth_-_Core_Rulebook_1_5e.pdf, other is Legends_of_Akeroth_-_Core_Rulebook_(1_5th_Edition).pdf ?? do i need to download both and compare them to last version i saved and go page by page to see which is the update?