The conversion of the project was successful.

The new directory structure is as follows:

F:/TEXTBOOK/PSPICE AUG 19 2008/CHAPTER 6 PSPICE/Switched Capacitor Converters
    inverter.opj
    inverter.dsn
    inverter.dbk
F:/TEXTBOOK/PSPICE AUG 19 2008/CHAPTER 6 PSPICE/Switched Capacitor Converters/inverter-PSpiceFiles
    inverter.lib
    inverter.ind
F:/TEXTBOOK/PSPICE AUG 19 2008/CHAPTER 6 PSPICE/Switched Capacitor Converters/inverter-PSpiceFiles/SCHEMATIC1
    SCHEMATIC1.net
    1.sim
    SCHEMATIC1.als
F:/TEXTBOOK/PSPICE AUG 19 2008/CHAPTER 6 PSPICE/Switched Capacitor Converters/inverter-PSpiceFiles/SCHEMATIC1/1
    1.out
    1.out.1
    1.prb
    1.mrk
    1.1op
    1.cir
    1.mif