All IDE Component icons disappear when I open my project - ide

I just upgraded to 10.2.3 (Tokyo) from Seattle on a laptop running Windows 10.
I use & need some Scalabium components (by Mike Shkolnik) and have attempted to install the latest version from the downloaded .pas files - which are 10.2.3-compatible.
I've had no trouble last time I installed those components for Seattle, but I do it only every few years.
I think that I have installed that package - the components show up in the IDE - but with some wrinkles:
I must have done something wrong.
Here are the symptoms:
When I start Delphi, all icons show on all IDE component tabs on the
Component toolbar. All's good. [see first screen capture]
[]1
When I open my project (from the Startup Layout), my code appears OK, then there is a 1-2 second wait, then ALL icons, from ALL component tabs - disappear, not just from the SMComponents tab. Gone.[see second screen capture]
With my project still open, if I click again on Tools > Options > Component Toolbar, two things happen [see third screen capture]:
A> The Tools > Options > Component Toolbar pop-up contains all the correct icons for all the components of all tabs (pages) - no change there.
B> However, behind it, on the IDE, all the icons are back, in all the tabs, not just the SMComponents tab! It's a miracle!
When I close the Options window, the IDE icons disappear again - we're back to the second picture above. Quite counter-productive.
Any suggestions on what might cause this (probably something I clobbered...) would be welcome.
Thanks!

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