Hello ArthurZ,
It depends on a feature, but the “HTML Matching Tag Highlight” feature is on by default if a user freshly installs EmEditor, but off if a user upgrades. One of reasons is the data field that remembers the option is 0 (off) by default, so it needs an extra code to turn it on by default. However, the real reason is that… if the new features are on by default, many users will ask me how to turn off the new features.
In the future, I will force features on if I really want people try the new feature.
Thanks for your inputs!