1. uninstall previous version
2. install 2074
3. copy and replace the VA_X.dll
1)msvc2010 - C:\Users\Administrator\AppData\Local\Microsoft\VisualStudio\10.0\Extensions\Whole Tomato Software\Visual Assist\...\
2)msvc2012 - C:\Users\Administrator\AppData\Local\Microsoft\VisualStudio\10.0\Extensions\...\
3)msvc2013 - C:\Users\Administrator\AppData\Local\Microsoft\VisualStudio\10.0\Extensions\Whole Tomato Software\...\
4)msvc2015 - C:\Users\Administrator\AppData\Local\Microsoft\VisualStudio\10.0\Extensions\Whole Tomato Software\...\
don't care about "License: trial" status