C'mon guys, I know the OP is being silly but he's also being jerked around.
First off, be patient. Members here have seen threads about such questions pop up many times, so not everyone's keen to act as technical support. Once you make a thread, be patient. Give it enough time before bumping the same thread.
Your posts are also very low effort. You don't tell anything about whether you are facing some issue or you're just going by what someone posted on the internet. No other info about usage or computer either.
Secondly, don't listen to what r0ach says. He is loud and active enough to get his statements noticed, but almost none of his claims have any substance to them. Just because his claims tickle your OCD doesn't mean any of it is right.
Now for your Synapse issue: I don't have enough experience with Synapse v3, but with v1 and v2 it was pretty clear that installing it and/or changing DPI levels through it will change how your sensor feels. It was obvious enough for a lot of people to notice it. It was like the sensor would be laggy or floaty.
Did it affect accuracy/precision? Don't know.
What exactly did it change? Don't know, and hard to know.
Could it be reversed? 99% of the time No.
But I am talking about a significant change here, I don't know if your question is about an actual change or if you're just being concerned about some hypothesis.
The only thing to do with v1/v2 was to never install Synapse and live with the factory settings. This is not possible for everybody, especially since the mice affected also did not have 'true' onboard memory (they only saved 1-2 settings without Synapse). And we have so many great options now, I don't see a reason why Razer has to be among priority suggestions. This whole cloud-based mouse software trend is bull**** anyway.
With Synapse v3, I don't think it's as much of an issue, or the effect's significance has reduced, or people don't care. Either way, I wouldn't be surprised if it did affect some users, even if the issue was fixed for the majority. If you don't feel a noticeable difference and can play fine with it, then just apply your settings and uninstall if possible.
If you do notice a difference in tracking/feel, I would suggest returning your mouse for another new unit, wiping Synapse completely from your PC, then using the mouse with factory settings. If you really want it, maybe install Synapse on a different computer and configure your mouse there, then use the mouse on your main PC and see if it helps. If it's not saving some/all of your settings on the mouse, well, don't say I didn't tell you. Gotta deal with it or get a different mouse.
I don't like how other brands like Logitech and SteelSeries also have cloud-based mouse software now. Sure, maybe it doesn't **** with the sensor anymore but I have read how the software itself can be finicky sometimes. What need is there for it to be cloud-based anyway? What is this over-engineering for?