Here is the official guide to update KT200/KTM200/ECUTuner ecu programmer software.
KT200 will prompt new version available when there is a new version. Press OK and follow steps below to run an upgrade.
Download the latest patch and dfb2xx.ll here
Unexact zip file
Load and install the Patch
Copy dfb2xx.dll to replace the specified folder file
Copy and paste dfb2xx.dll to C:/KT200-master/DFBTech_Driver/i386 folder
If your system is 32bit, copy and paste dfb2xx.dll to C:/Windows/System32 folder
If your system is 64bit, copy the dfb2xx.dll file to C:/Windows/SysWOW64 folder
Then run KT200 software again.
Update KT200 software finished. New version software is ready to use.