You will need to access DeskMan/2's PERFSET.CMD files in an OS/2 command line window.
If you cannot open an OS/2 Command Line Window
The commands described below are case-sensitive. Be sure to enter them exactly as shown on this page.
If the objects were made invisible on a global basis, type:
PERFSET "<WP_SYSTEM>" "<WP_CONFIG>" DMExtAllowVisible=1
If the objects were made invisible on an individual basis using the native OS/2 style, type:
PERFSET ALL "<WP_DESKTOP>" NOTVISIBLE=NO
If the objects were made invisible on an individual basis using the Workplace Shell Extensions, type:
PERFSET ALL "<WP_DESKTOP>" DMExtAllowVisible=-1
After you have restored your desktop objects, remember to rename the STARTUP.OLD file to STARTUP.CMD and reboot your computer.