**0.39.X contains changes in sync protocol compared to 0.38.X so all instances must be updated.**
* sync protocol now has the ability to recover from sync errors - when such error is detected, partial resync is triggered on affected entities
* changes in the app layout:
* by default is now using frameless window - it is possible to enable the native title bar in Options -> Appearance
* tabs are now on top, similar to e.g. Chrome and Firefox
* left and right sidebar are now resizable by dragging handles, no need to define the sizing numerically in Options anymore
* demo document now includes some basic statistic scripts
* (experimental) - it is now possible to include one note into a text note (through block editor -> include note) so that content of included note appears as a widget as part of the outer note
* printing and HTML export now render more closely to in-editor look 782