Install asar
`npm install -g asar`

Go to the Ressources folder of the app

Mac : `StarUML.app/Contents/Resources`

Windows : `C:\Program Files\StarUML\resources`

Unzip app: `asar extract app.asar app/`

Modify the folowing function:

```javascript
checkLicenseValidity () {
    this.validate().then(() => {
      setStatus(this, true)
    }, () => {
      // setStatus(this, false)
      // UnregisteredDialog.showDialog()
      setStatus(this, true)
    })
  }
  ```

  Go back to the resources folder.

  Repack the app: `asar pack app/ app.asar`

  On windows just run the app.

  On mac due to the signature change, you have to disable gatekeeper just for the first launch

  `sudo spctl --master-disable`

  Lauch the app enable gatekeeper

  `sudo spctl --master-enable`

  Enjoy !