Hangs when any parameter is attempted to be changed.
May 25 19:13:07 Altair-IV.local WindowServer[34985]: disable_update_timeout: UI updates were forcibly disabled by application "DT4" for over 1.00 seconds. Server has re-enabled them.
May 25 19:13:11 Altair-IV.local spindump[472]: Saved hang report for DT4 version 1.8.2 (182028) to /Library/Logs/DiagnosticReports/DT4_2015-05-25-191311_Altair-IV.hang
May 25 19:13:21 Altair-IV.local WindowServer[34985]: disable_update_likely_unbalanced: UI updates still disabled by application "DT4" after 15.00 seconds (server forcibly re-enabled them after 1.00 seconds). Likely an unbalanced disableUpdate call.
May 25 19:15:47 Altair-IV com.apple.xpc.launchd[1] (jp.ac.soka.unemi.DT4.708612[73742]): Service exited due to signal: Terminated: 15
May 25 19:15:58 Altair-IV.local spindump[472]: Saved hang report for DT4 version 1.8.2 (182028) to /Library/Logs/DiagnosticReports/DT4_2015-05-25-191558_Altair-IV.hang