There are several places in APM where we can reset user settings and layout to default. It might be required when there is a glitch in the application due to the connection lost, etc.
Crew List Module > Layout tab > Reset.
This options only affects the Crew List layout.
View tab > Reset Toolbars.
This options resets the toolbars under any modules/ playgroups.
User Profile > Reset Account to default.
This reset sets all the user settings and layouts in the system to default.