Woke MacBook Air up from sleep with Wi-Fi turned off.
Turned on Wi-Fi, then connected to a network server plus opened Safari so could create this thread.
Opened Logos 7.2 SR-1 on OS X 10.10.5 to a blank layout, which started Sync arrows spinning.
Tried to enter a scan command, which received another spinner:

Sync arrows continued to spin for many minutes. Logos.log file showed some sync time out errors.
Let arrows spin for 1.5 hours followed by quit of Logos 7.2 SR-1 followed by clicking "Exit Now"
After waiting 15 minutes for "Exit Now" (and Logos not responding), choose to Force Quit. Next zipped up diagnostic log files:
2502.Sync_spinning_errors.zip
Restarted OS X with Wi-Fi enabled for next sync attempt.
Keep Smiling [:)]