How to delete an entry from 'tssh properties'?

The instructions are geared toward a Linux TSPS, however the overall concepts apply to Windows too.

Assume that the bad entry in the TSPS properties is named "badentry"

Get the username for the TSPS DB:
cd /opt/bmc/TrueSightPServer
grep -A 1 database_username TrueSightPServerInstalledConfiguration.xml
      <name>TrueSight_database_username</name>
      <value>tspsuser</value>
The above command looks for the string "database_username" in the file TrueSightPServerInstalledConfiguration.xml, and then also grabs the line after that.
In this case, our TSPS DB username is tspsuser

 cd /opt/bmc/TrueSightPServer/truesightpserver/modules/pgsql/bin
 ./psql -d truesight -U tspsuser
(You will be presented with this prompt: truesight=#)
truesight=# delete from sitelocalconfiguration where key like 'badentry';

If the command worked, you will see:
DELETE 1

Then quit:
truesight=#\q

The "badentry" bad entry should be gone now.