NEW: Thonny now runs in single instance mode. Previously, when you opened a py file with Thonny, a new Thonny instance (window) was created even if an instance existed already. This became nuisance if ...

A native in-engine C++ plugin cannot be a single drop-in binary across versions: UE enforces an exact-match .modules BuildId at load and guarantees no C++ ABI stability between versions (even 5.x → ...