Having found that OO only works with a 32-bit JRE I've installed it, but OO says that neither C:\Program Files (x86)\Java\jre7 nor C:\Program Files (x86)\Java\jre7\bin contain a valid JRE. But as far as I can see they're OK, and going to the bin directory in a console session and doing a "java -version" certainly shows a 32-bit JRE.
Any ideas how to get OO to work again? Quickly?
I didn't find the right solution from the Internet.