In the wiKPA there's a complete (user!) guide to troubleshooting. Have you already given a look at it?
Erasing the flash is never recommended. Try a system reset if you must.
Well, the chapter is called "Troubleshooting", you can't be wrong with it 
When reading, pay specific attention to what ckemper and timo say to dismantle some myths about resetting (or clearing cache or the like)'s benefits.
What I want to say regarding the OP's original post and concern about erratic behaviour of his profiler is:
Instead to (maybe erroneously) assume there is some erratic behaviour with his profiler that can be cured by doing 'some kind of reset, but which?' it would be far better to report the erratic behaviour as correctly as possible to support and wait for their advice.
This advice would THEN be a reason to CONTRIBUTE to the wiki (specific problem described - solution given).
At this time the problem description is way too heterogenic to recommend doing troubleshooting with the help of the wiki.
It is like a patient saying: 'I THINK I have heartache and back pains, what do you recommend for therapy.'
Does that ring a bell? Yes, children: Before the therapy comes the diagnosis. 
... Hey, you're a "Sage" now! 
Display MoreOkay , Ingolf. I spoke this nice guy from support. I did what he told me to do and on the fly and the erratic behaviour is gone.
I do not want to say much about it here, because people fumble around with the hardware too soon and too often.
That is why i was sceptical about erasing or this and that and wanted to know exactly what is done while reseting or clearing the cache or
whatever methods are there. I recommend - in ANY case - giving support a ring, it does not cost the world, is friendly and
you are on the safe side of actions.
It seems that after 20 months of intensive use there is the possibility that memory fragments, but as i said: call support before making decisions.
Geraldo, you sum it up nicely. It's a wise thing to do to call support.
... Coming soon 
... Coming soon
Err... yes, by your posting frequency you'll soon have reached super-sage status...
... Senti chi parla! 
Ingolf's posts per day: 4,4
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Hahaha...
