If for instance a users inbox goes missing or the 'New Memo toolbar buttons disappear
resulting in 'Error loading USE or USELSX module' or similar.
You can restore this by doing the following.
1) Select the offending database on the server
2)Click > File > Database > Replace Deisgn
3) Next, pick a relevant template for that user(according to the Client version
they are using eg. 4.1, 4.5, etc.
This will then restore the default desktop settings.