This is the issue: The application “Logos Bible Software 6” can’t be opened.
What version of Logos and on what platform?
Please ensure diagnostic logging is enabled and post logs after you get this message (details at https://www.logos.com/support/logos6/windows/report-problem or https://www.logos.com/support/logos6/mac/report-problem)
logos 6 latest version....running on yosemite 10.10.4
Are you able to post logs?
do i need to delete what i have and download it again?
You can try redownloading the app—it won't hurt anything to try. Just delete the Logos app, however, not any other Logos folders.
However, posting your logs as Graham suggested above, would be the best way to get help. See his links or the link in my signature.