In the Revit.ini file, settings in the [DNSM] section record your preferences for seeing various recurring task dialogs in the software.
By default, the [DNSM] section does not exist in the Revit.ini file. When you specify a task dialog to not display in the future, a corresponding setting specific to that dialog is added to the Revit.ini file. Use these entries to update your preferences to see the task dialogs again.
Syntax: TaskDialog_SPECIFIC_DIALOG_NAME=<value>
Type = integer
Valid values:
[DNSM] TaskDialog_Energy_Model_Geometry_Deletion=1 TaskDialog_Energy_Analytical_Model_Complete_Check_Limitations=1 TaskDialog_Wall_Attach_To_Roof=1001 TaskDialog_Wall_Attach_To_Floor=1001