Long time user, I've been away from maths for a bit. I tend to use the portable version of SMATH and was surprised that the following plugins would not load. I have several worksheets that use the plugins and was wondering if they are now "redundant" as they are part of the core program or if I need to do something different

Hello Ruben,

Since the extensions manager is no longer available for older versions, you have to download and install the plugins manually (downlad the zip, the drag & drop in the canvas), going back to an appropriate release date.

The link to download any plugin version is this: https://smath.info/{LOCALIZATION}/view/{PLUGIN_ID}/history

Plugins' IDs can be found in the heaader of any worksheet where you used it (using a text editor). Localization is the one that is visible in your browser when you browse the forum.