As I try out the ColorSlide tutorial the Defold editor has hung up on me on two occasions - both times whilst I was adding new buttons to level_select.gui. Given that I am a newbie I probably clicked around a few times more than required but on each occasion it was whilst I was busy adding the third button.
It would be nice to have an autosave/backup feature here since I have had to start adding buttons from scratch after each crash.
The steps were pretty much these - I was still trying to figure my way round and I added, dragged, resized, deleted, added… UI components several times over while trying to create 4 level buttons in that tutorial. On both occasions the screen went grayish - like it was covered by a semi-opaque dialog overlay layer - and I could do nothing more. A bit more by way of hardware info
Intel i5-8500 CPU running at 3Ghz with 16Gb of RAM
Intel UHD 630 Graphics
I can’t tell you much more since in both instances I had to kill the process and fire it up again.