the message "failed to open HKCR\http registry key!!!" tells me the problem is outside of blockland.
changing up you key maps to whatever isnt going to help.
re-installing blockland probably wont help -- unless its in C:\program files\ and you install it to c:\games\ then there is a chance.
Try this:
find (or make) a html file, and put it somewhere. then when you double-click on it, your internet browser (IE, Chrome, firefox, whatever) should open. My guess is that it will not open, and you will need to fix it.
how to make a html file depends on too many different things, so you will have to figure that out yourself.