Pre-release updates are updates that have been thoroughly tested and will be released soon. Enabling pre-release updates gives access to the most recent detection methods and fixes; however, pre-release updates might not be stable enough at all times, so you should always revert to using normal updates after an issue is resolved.
Click Policies, select the desired Built-in policy and then select the policy that you want to modify.
Click Actions → Edit.
Click Settings → Update, and expand Profiles.
Expand Updates. From the Update type drop-down menu, select Pre-release update.
Click Finish. Policy changes will be applied to clients the next time that they check in to ESET PROTECT Server.