Stable update: Instance Bar; Instance tags & signals; Flowcharts improvements & more.
I figured it out, looked in the console and saw the error when opening: “Error: name ‘Tags’ already in objects class ‘Icon_Sound’ namespace”
I opened the project in the previous version, renamed this Instance variable 'Tags' in the sprite to 'STags' and saved it and the project opened in the new version. Probably the variable 'Tags' is reserved and cannot be used now (I created a blank project, created a sprite and tried to add a variable named "Tags" - and got an error that such a variable is already used)...