I download from Mega.co, both links clean
The files are identical - here are the SHA1 sums:
6c9c7440cac3becccf570761494a2650a2795c5a *rootcoin-qt-v1.1.0.0-win32_MEGA.zip
6c9c7440cac3becccf570761494a2650a2795c5a *rootcoin-qt-v1.1.0.0-win32_DROPBOX.zip
Both are perfectly clean. There is not a hint of malware in these files.
The warning was definitely just a Chrome glitch. No reason to be alarmed.