I can confirm the V7.x installer error while updating the language files. I stuck every time at this point. The installer do a update to the files but dont display the continue button. You have to use the browser-back button and skip the next part wit 'do my own modification'. The rest runs fine. After this you have to check you language files by hand (I use beyond compare).
I'm having the same experience as Zarzal.
Like him, I had to use the "I will do my own language file mod" option to get the installer past the "Language" step.
Zarzal is using his third-party/custom German language.
Are you using only the stock English language for your install, or do you have multiple languages / asking the upgrader to also automatically upgrade those additional languages for you?
