The conversion of the project was successful.

The new directory structure is as follows:

S:/WORKAREA/Lab3/1
    Buck Converter HW#3.opj
    buck converter hw#3.dsn
    buck converter hw#3.dbk
S:/WORKAREA/Lab3/1/Buck Converter HW#3-PSpiceFiles
S:/WORKAREA/Lab3/1/Buck Converter HW#3-PSpiceFiles/SCHEMATIC1
    SCHEMATIC1.als
    SCHEMATIC1.net
    SCHEMATIC1_sch.prp
    Trans.sim
S:/WORKAREA/Lab3/1/Buck Converter HW#3-PSpiceFiles/SCHEMATIC1/Trans
    Trans.1op
    Trans.cir
    Trans.dat
    Trans.mif
    Trans.mrk
    Trans.out
    Trans.out.1
    Trans.prb