Update GFXplorer 3.15.0.1740

[ha14]

New in version 3.15:

• Added support for Windows 11 RTM/21H2, Windows 10 21H2 and Windows Server 2022;
  
• Added support for .Net Core and .Net 5+;
  
• Added option to manually change the app's visual theme;
  
• Added option to save settings in a file or in the system registry;
  
• Added "Resource monitor" and "System Restore" to the tools tab;
  
• Added en-US and en-GB variants of localized English dates and numbers;
  
• Added size in GiB (1 GibiByte = 2^30 bytes) and GB (1 GigaByte = 10^9 bytes) for drives and partitions;
  
• Replaced MB (1 MegaByte = 10^6 bytes) with MiB (1 MebiByte = 2^20 bytes) where needed;
  
• New header, improvements to UI and many tweaks and bug fixes.