Clear app data after installing apk if app is being upgraded from previous version; Settings activity; Settings: option to automatically close drawer menu when selected node does not have subnodes; Settings: Dark/Light/System theme switch; Settings: Content left and right side padding; Settings: restore last node; Settings storage refactoring; Made some changes to recyclerview adapter to use more efficient data set changes when possible; Moved some data processing tasks for displaying node content to background thread; Fixed: Not always displaying correct menu or not correct “selected” node being showed after app startup if previous showed node was restored; If user selects the same node that is being displayed – node content/menu is no longer reloaded. Refactoring: clearing android studio warnings, removing unnecessary local variables, adding some code for accessibility purposes, etc; DrawerMenu filter function: user can choose to omit nodes that are marked “Exclude from Searches” from filter results; Intent-filters to associate CherryTree files with the app; Option for user to select a where databases should be save: /data/data/ or /Android/data/ (external); Search; Some other stability fixes;