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Thank you for the heads-up. Downloading executables from the internet usually triggers an anti virus software, avast for example is contacting the cloud / reputation services (if enabled) and checks how many other avast users have downloaded this file. In case of KipeeCraft I suspect it would be a very small number. This leads to a low reputation and very likely a warning or depending on the configuration even to quarantine of the file. The same happens for example with the chrome browser, I frequently get the message [file] is not commonly downloaded and could be dangerous.

The warning is correct and so is the cloud service and avast. The only question would be, what the exact message was like. If it tells you something precise, then something might indeed be wrong. If it is a general warning, it is usually just because of reasons mentioned above.

The .EXE is the same as the .7z just with the "create self extracting archive" option checked inside 7zip...

I usually check with virustotal.com and here are the results for the 7zip file and the kc.exe inside. It seems some anti virus programs consider even a standard self extracting archive suspicious.

https://www.virustotal.com/en/file/7db5de5fa7df35a889bb74ff0ea9c3 b67d713586bb26dc6328119b0bdc1dba6b/analysis/1458639087/
https://www.virustotal.com/en/file/231d16359f237d89e957db0876f2a5 e857e8d7560c63bf1cdeace6b66c3d5496/analysis/1458639117/

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