How to solve XPROG-M 5.5 unknown command error ?

How to solve XPROG-M 5.5 unknown command error ? 

Please follow the manual step by step:
1. Erase chip atmega 64
2. Program eeprom , Flash 
3. Set Lock bits and fuse bits. Program lock bits, fuse bits.
4. Copy Xprogbox 5.51 to C:\ and run Xprognew.reg
5. Run XprogDesktop.exe and update .
 

Customer feedback:

Finaaly, my old xprog-m 5.0 now have the 5.51 version succesfully installed! 
I already tested with Infineon xc23xx, Mac7242, SPI, I2C, Microwire eeproms, some 9S12, HC11, HC05 and TMS. 
Works great, verify error also fixed with update. 
Before this update I can't read/write the HC05H12, now it's working! 
All authorizations activated.


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