For Luis Dongo’s solution to work, make sure to refresh your prefs first. But before doing so also make sure that it’s not fetching the “old” prefs from somewhere else.
The big trouble with Thrashing your preferences, is that it fetches “old” preferences from not only earlier C7 versions. It also fetches the preferences from Cubase 6.5 (go figure)…
…This happens at the first start after thrashing your prefs. To NOT fetch any earlier prefs, you have to move all other Cubase versions App folder out of Steinberg App Data folder (C:\Users\YourName\AppData\Roaming\Steinberg).
Then start up your troubled version again.
PS. After opening C7.5 again (starts with default prefs), you can bring back the moved folders, if needed.
Beware also that if you uninstall C7.5, it will NOT delete your C7.5 App folder. This can be a good thing, or for the most part, a bad thing (there’s usually a reason for re-installing). So Delete this manually.
So after a re-install it will fetch its own “old” App data. After thrasing your prefs (app data folder), it will fetch the app data from an earlier C7 version. Or even C6.5 if no other C7 version is present (this can introduce all sorts of crazy things).
This kind of info should be gathered into a “sticky”, and be the first info (with a warning) in the install manual.
No wonder people are sometimes struggling.
Big thanks goes to my uncle 