Even though all VM variables under *.product are correctly chosen as follows:
-Dosgi.sharedConfiguration.area=file:configuration
-Dosgi.sharedConfiguration.area.readOnly=true
-Dosgi.configuration.cascaded=true
[email protected]/.wg_wb/configuration
-Dorg.eclipse.update.reconcile=false
-Dosgi.requiredJavaVersion=1.8
-XX:+UseG1GC
-XX:+UseStringDeduplication
The SHOW_WORKSPACE_SELECTION_DIALOG=true can be seen under preferences, there is also no *.snap files to delete.
Only by using this version of plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar instead of org.eclipse.equinox.launcher_1.4.0.v20161219-1356.jar can I get the workspace prompt to work correctly.
Image below is from log Trace with the Exception thrown.