Thanks for the tip.
I reloaded CFS and all the planes were fine.
Then as it frequently happen CFS generates an "error"
or aborts to a"pale screen" format.
After which the lost spinners and props occur.
It appears these errors and pale screen crashes lead to
"erroneous data" being written to the CFG file.
Like the 'performace_mode' line, the 'imagecomplexity' line, the propeller_visibility' line and others ...etc.
All or some of which leads to the lost spinners & props.
So if your having the "pale screen" crashes you might be losing your spinners & props.
Love to learn something everyday!!!!!!