Drag the downloaded .jar file to an open instance of Astah. A pop-up will appear asking you to confirm the installation, choose [Yes]. If the pop-up below opens, restart Astah.
If you see the [Drop in Calendar] option under [Tools], the installation is complete!
How to Use
Open a diagram and go to [Tools] – [Drop in Calendar]. A calendar window appears.
If you click the date on the calendar, the date will be highlighted in blue.
Click [Commit] button to paste the calendar on a diagram as an image.
Once the calendar is pasted, you can use it as an image file.
Restriction
The calendar cannot be imported as an image on CRUD or Traceability Map.