You will miss out on critical bug fixes and performance improvements. The current version as of early 2026 is v27426 .
Downloading specific version strings (like v1.0.10601.27) from unofficial "zadarma" (free) sites poses several issues: Gloomhaven na stiahnutie zadarmo (v1.0.10601.27...
These files are often bundled with malware or trackers that can compromise your system. You will miss out on critical bug fixes