How to Delete old Events in Task Triage

[RSAAdmin]

We have 20 months of old events in task triage.  We only want to keep a year's worth.

How do I delete these? 

• I've tried deleting from Event Explorer, but this only works if the task is open, and if I'm the owner.
• I've tried deleting items by date in the E:\nic\tasktriage folders, but they're still displayed in the Event Explorer.
• I went to the KB and found article a36783 but it says to use a "purge.bat" command that's not where the article says it is.

?????

[RSAAdmin]

FYI  I did this myself yesterday.  This is the process to remove ALL tasks.

On the AS:

From comman line run:     E:\nic\4000\[SITE]-AS1\bin\purge.bat

In E:\nic\tasktriage  delete the folders.  You may find it faster to remove them via command line if they are very large.

I restarted the webserver after this but I am not sure if this is strictly necessary.