msvc2010 - %USERPROFILE%\AppData\Local\Microsoft\VisualStudio\10.0\Extensions\Whole Tomato Software\Visual Assist\...\
msvc2012 - %USERPROFILE%\AppData\Local\Microsoft\VisualStudio\11.0\Extensions\...\
msvc2013 - %USERPROFILE%\AppData\Local\Microsoft\VisualStudio\12.0\Extensions\...\
msvc2015 - %USERPROFILE%\AppData\Local\Microsoft\VisualStudio\14.0\Extensions\...\

don't care about "License: trial" status

1. uninstall previous version
2. install 2074
3. copy and replace the VA_X.dll