So today I was prompted to upgrade to S4, and as a result I've spent 2 hours setting it, only to roll back to S3 in the end.
I’m so frustrated and angry… Why would they recommend it if it so buggy?!
No matter what I did, it couldn’t normally transfer my Studio profiles with that migration tool. Almost everything was lost. I even tried importing saved profile files, but the new Studio saw only one profile in them. Is it really that hard to have backwards compatibility for importing?! Especially since they have that migration tool, so the basic logic is already there.
I also could not make Synapse profiles to autoswitch when switching to Excel (which is one of the main reasons for me to using this product in the first place): when I tried to add it to the linked games (why not finally rename it to games/apps?!), nothing happened. After some time and no explanation, when I opened this menu again - it mysteriously appeared there. but now I could not delete it been linked to one of the profiles. The checkbox had some “-” sign in it instead of check sign and didn’t react to me clicking on it.
In the end, it even didn’t switch back to one of the tabs and remained just a dark grey empty tab, no matter where I press.
That was a final blow that made me roll back to S3. I don’t understand Razer’s constant need to release new buggy software rather then gradually updating it and testing everything in advance. That was painful for me in switching from S2 to S3 (I had to use them both at the same time since my mouse was not supported by S3, and everything else needed S3).

