Stable update: Instance Bar; Instance tags & signals; Flowcharts improvements & more.
Send your project to supportbpf@construct.net and we'll take a look. Note most such recent cases have been due to an issue this guide covers.
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)...