Symbol Dynamics® EXP®
The Scientific Word Processor
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Microsoft changed the Windows Explorer file searching facility in Windows XP so that it only searches files whose filename extension is registered with Windows as supporting searching. There is a Microsoft Knowledge Base article on this issue.
EXP versions 3.0 through 5.0.2 are affected by this design change.
To correct this problem for EXP, perform the following steps:
(This naming trick is necessary because Internet browsers block the .reg extension.)
This merges the information into the Registry of your Windows system.
Windows XP should now be able to find text contained in .wxp files.