You can launch Astah by:
When launching Astah, it automatically looks for new updates through HTTP access and shows a dialogue if a newer version is available.
If you wish not to check for updates, change the option from [Tools] – [System Properties] – [Other].
When a license is not set up yet, a license dialog appears. You can open this from [Help] – [License].
If you have a floating license, click [Set Floating License]. For further steps, please read the floating license guide.
If you have a non-floating license, click [Set License key] and specify your license file (.xml).
A free 20-day trial is included at the first installment. Once the first 20 days are over, please purchase a license.
When you start Astah for the first time, you may get this blank screen.
But when you create a project or a diagram, all the panes will go active as below: