Yes, a portable version has always been available:
http://7thheaven.rocks./releases/7th_Heaven_2_0_3_406_Portable.zip . Unzip all files and subfolders to a directory of your choice (C:\7th Heaven\ is the default).
With that said, your stats are completely made up, and no, well-known installer generators do not inject trojans into the installers. Nobody would use them of course, defeating their purpose. Additionally, antivirus tools are next to useless these days and detect damn near anything as a false positive, particularly for software like 7H that modifies/hooks an external program or memory. AVs are more of a security and privacy risk these days. A multi-engine tool like VirusTotal that uses questionable, poorly developed, fly-by-night AV programs just magnifies the problem and gives people a false sense of security while at the same time causing unnecessary hysteria due to false positives on perfectly benign software (like 7H, FFNx, Satsuki's Speed Hack, SR, etc.). If anything, the fact that only 2 no-name AV programs falsely detecting when multiple other, more reliable AV programs don't, should tell you something. These things are about as reliable as getting your news from Facebook.
