There's a very useful Troubleshooting document called Trb20021.pdf that should be in your DBAMFG folder.  In case it isn't, here's what it says.
Problem: When you start DBA you see a message indicating that a required
DLL file WBTRV32.DLL was not found.
Use Windows Explorer or the Find > Files or Folders utility to determine
whether the file exists in C:\PVSW\BIN. If not, reinstall the Pervasive.SQL
client (refer to Set Up Workstations to Access DBA (Version 2002.1), available
on the DBA Web site).
If WBTRV32.DLL does exist, use SYSEDIT on the AUTOEXEC.BAT file to
add the C:\PVSW\BIN to the appropriate PATH statement.
In Novell NetWare, there may be additional PATH definitions in the user