currently errors are only logged within the Windows Event Viewer ( example howto What Is the Windows Event Viewer, and How Can I Use It? )
Go throught the folders shown in left panel and search for Flight..Sim Errors. May be you have a summarized “Admin… View” :
Important is then the message printed in “General” Tab right side.
no.. precondition is only that US is installed. Your windows can still run in your main language.
If installing was not helpfull.. hmm… but let us have a look into the error message first 