We have always had that set to "Check for updates, but let me choose whether to install them."

Our install may have gotten the "forced" upgrade because it was several versions behind. We put off upgrading as long as possible because there are always hassles with things like plug-ins/add-ons and settings in the config file that behave differently in different versions.

Now, 2 cups of coffee later, the deed is done and the tweaks [mostly] working as usual.

Jim
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Speaking from a secure undisclosed location.