Click and uncheck the Documents/TechnoBrain path.
While QooApp no longer offers ATC4 directly, the game might still be available on other cloud‑gaming aggregators. For example, the ATC4 New Chitose cloud game is still listed on LDPlayer. Always verify that the site is legitimate and that you are not downloading a pirated or modified APK, which could contain malware. I Am An Air Traffic Controller 4 Application Not Found
For mobile players, the official remains the best option. If a cloud‑gaming version of ATC4 (e.g. ATC4 Sendai or ATC4 New Chitose ) is available in your region, you can buy it directly from Google Play. The Japanese message shown on QooApp explicitly says: “Please purchase it from the Google Play Store.” Click and uncheck the Documents/TechnoBrain path
: Some users have found the game fails to launch if OpenAL is missing. Reinstalling OpenAL can resolve "Application Not Found" or startup failures. Always verify that the site is legitimate and