Check that the styles folder has uploaded correctly. That should look like prosilver and there's no styling showing. If not, that may also indicate several other files are missing.
-:|:- Support Request Template -:|:- "Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb"
No problem in navigating to /install from my side.
Spelling is freeware, which means you can use it for free.
On the other hand, it is not open source, which means you cannot change it or publish it in a modified form.
Time flies like an arrow, but fruit flies like a banana.