I\'ve seen the other Mercurial case-folding Answers on StackOverflow - they say that if you have access to a case sensitive file system like unix then check out there and it
Its a regular problem in Windows for not using case-sensitive file systems. If you want to do it with the TortoiseHg Workbench installed, search the file and rename it:
right click/TortoiseHg/Rename File
It will rename the file to the right case sensitive name you want. The next picture shows how i changed XMLConverter for XmlConverter

Then in the Workbench you may commit the file change:

This was updated a week later
The solution presented may gives you problems later updating the whole repository from another PC. So the ultimate way to resolve it, may be making 2 commits:
So it got like this:

This is actually the way it doesnt make conflicts in Windows anymore. It looks ugly but it is effective.