serious sam - 2012-12-30

Hi, I upgraded waterfox from v12 to v16 on an old computer running windows 7 x64 ultimate and after that moment waterfox wont open.
I tried uninstall-reinstall, tried waterfox portable...but nothing.
At the moment I'm using firefox which is running without any problems..

This is what happens.
14:53:28 Starting waterfox.exe...
14:53:29 Create Folder C:\Users\George\AppData\Local\Mozilla\Firefox\Profiles\dszje11e.default\startupCache
14:53:29 Create File C:\Users\George\AppData\Roaming\Mozilla\Firefox\Profiles\dszje11e.default\prefs-1.js
14:53:29 Process Created C:\Users\George\Desktop\Waterfox 16.0.1 Portable\Waterfox 16.0.1 Portable\waterfox.exe
14:53:29 Create Folder C:\Users\George\AppData\Local\Mozilla\Firefox\Profiles\dszje11e.default\startupCache
14:53:29 Create File C:\Users\George\AppData\Roaming\Mozilla\Firefox\Profiles\dszje11e.default\prefs-1.js
14:53:29 Process Killed C:\Users\George\Desktop\Waterfox 16.0.1 Portable\Waterfox 16.0.1 Portable\waterfox.exe
14:53:29 Create File C:\Users\George\AppData\Roaming\Mozilla\Firefox\Profiles\dszje11e.default\localstore-safe.rdf
14:53:30 Process Killed C:\Users\George\Desktop\Waterfox 16.0.1 Portable\Waterfox 16.0.1 Portable\waterfox.exe