The x86 version is for 32 bit Windows Operating System and the x64 version is for the 64bit Windows Operating System. However if you've downloaded and run both files and the issue still persists, we recommend that you contact the game developer or visit their support site to check for a newer patch of the affected game and also for further support.
On the other hand, if you wish to further troubleshoot the issue, our next option is to perform a clean install and re-install the affected application. Only choose this option as a last resort because it will delete your personal data from the device. It's a good idea to back up your files before performing the clean install and to do this, you can follow the steps provided on this link. Once you're done, you can refer to this Forum Article created by community MVP Andre da Costa on how to perform a clean install.
Feel free to post back should you encounter any challenges along the process.