Before making any purchase we strongly recommend you take up the offer to first test drive the software by using the trial version.
The trial version is identical to the registered version, providing a 45 day trial period in which to fully evaluate the software and during that trial period you are entitled to the exact same levels of software support as a registered user.
Also make sure you using the latest version of the Agent SVN as indicated in the About dialog.
Registration of the Agent SVN involves the purchase of an activation key and that purchase provides the user with a perpetual key, meaning the activation key will never expire and will continue to work forever with the version of Agent SVN available at the time of purchase.
Registration also provides the user with one year's worth of free software upgrades, which equates to between one or two free upgrades.
This Agent SVN product works with the Subversion version control and does not work with the Git version control.
If you want software that works with Git you need to purchase the Agent Git product instead.
So please take a moment to make sure you are purchasing the correct version of the software for your needs.