since we are the SK consumers, not the developer, we have only limited things to say, like "remove ini files and other leftovers" (already you did) "use the latest nightly builds of SK" (already did, too) "make sure the whitelist and blacklist in your SK framework, skif or somewhat", or "ask SK developers on their site or discord if it is still bad" (I resolved multiple issues asking them) especially, if the game CRASHES with SK it is rather okay we have some clues or logs, but if the game does not attach it is even harder to say something.
in my case, the latest 36.0 update caused hearthstone to crash when starting with SK, and removing .ini file recovered it. SK seems to conflict with latest Hearthstone with some configuration enabled I roughly assume. before that, there was an issue with DumpOnFirstLoad=true, asked SK developers for the solution, and removing the dump directory contents helped.
Hope you find your solution.