Upgrading from 1.8.33 to 1.8.38 — anything to watch out for? — follow-up

The upgrade script is reliable but a backup costs you nothing.

I switched the cache store to Redis and the ACP feels snappier now.

Code: PHP

define('IN_MYBB', 1);

— always check for this guard in your own plugin files.

Make sure you take both a files and a database backup before upgrading.