There are newer BETAs available via SVN or Discord.
The BETA wizard build can be found there.
To install the new Trinity, simply download the new files.
Go to DB > Plugins >
Delete the existing Trinity folder
Open the BETA ZIP file that you downloaded.
Drag the Trinity folder inside of it into the DB > Plugins folder where the old one use to be.
You should be able to just load up DemonBuddy now.
To verify your version, just open DemonBuddy, go to the Plugins tab, click on Trinity, and it will show you what version you are using.