You will also need to update D:\SoftwareAG\CentraSite\logpurging\resources\purger.properties to specify the number of days to retain:
##partial commit enabled/disabled
enable.partial.commit=true
##policy log threshold
policy.log.partial.commit.threshold=1000
##approval log threshold
approval.log.partial.commit.threshold=500
##events threshold
runtime.events.partial.commit.threshold=1000
##metrics log threshold
runtime.performance.log.partial.commit.threshold=1000
No of days before the current day for which the data will not be included in the purging,
in case of Export Log Entries & Delete Log Entries (i.e. No date criteria specified).
2012-01-11 monthly purge to purge data older than 5 weeks (35 days)
purge.older.than=36
#CentraSite#webMethods#API-Management