Unless you have reflashed the ROM in it then the files are still there.
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The MobilePro 790 provides the Internal FlashROM Configuration
Utility, which allows for the instant recovery of customized applications
even after a cold boot.
In Windows CE devices, the cold boot process erases either applications
installed in SDRAM or system files stored in SDRAM for applications
that are installed in FlashROM. In either case, users have to reinstall these
applications to recover the whole system after a cold boot (except for the
HPC default software).
Each application is placed in its own folder in the HPC Internal
FlashROM folder, and a separate Default_Info folder holds the application
files (Help, shortcut, etc.), in order by application.