Kleopatra does not start

After installing gpg4win I have had a problem with iconv.dll (another version of this library has already been installed to c:\windows\system32). Starting Kleopatra caused a runtime error with a message: “something is messed up by a iconv call”.

After I deleted iconv.dll from system32, Kleopatra does not start at all (it actually starts, does something and then exits without a message). As far as filemon is concerned no log file has been created.

How else can I see what is wrong with Kleopatra?