Hi Sakura37 - Sorry to hear you are having troubles with Scratch. Does this happen every time you try to open it? Are you trying to open it with maybe a very large project? Does it do the same thing if you open it up with an empty new project?
I'd also be interested to know what version of Scratch you are using and what operating system you are running on your computer. Thanks!
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You can try getting either a new executable, or a new image file. These can be obtained by simply reinstalling scratch.
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