Recent patches have addressed several high-priority bugs reported by the community:
Sometimes the master server list fails in KRX. Bypass by connecting directly.
Fixed weapon firing bugs during rewinds and bad starting positions in Time Attack Scripting (TAS).
If the client crashes instantly without showing a window, a corrupted config file is the prime suspect. Rename your settings.cfg file to settings.cfg.bak .
Still crashing? Post your error_log.txt from the KRX folder to the DDNet Discord #client-support. Mention "KRX legacy" – someone will help.
Even if you temporarily disabled it, some antivirus software leaves background services active. Fully disable your antivirus or, better yet, add an exclusion for the entire KRX Client folder before extracting and running it again. After adding the exclusion, re-extract the .zip file and try to run it.
If you can open the client but cannot join any servers, your network protocol is likely out of date.