Why 5.2.3 ? 5.2.4 and beyond are adding too many language features for my cognitive comfort.
My upgrading philosophy is: upgrade only when it hurts too much not to. In my case, the cognitive benefits must outweigh the cognitive costs.
5.2.4 and features currently in the queue for the next release are too much cognitive cost for the cognitive benefit.
However, if you prefer to have the most current version of TiddlyWiki, then you should use the "Download" button from the TiddlyWiki web site (as shown in the embedded page below.)