Is there any way to experience the trial version?
You can visit the app store to download the Pix4Dcatch app Click here. I see you have already activated the Pix4Dcloud Advanced trial so, you can log in with your existing Pix4D account to capture and process the data.
Just for your information, Pix4Dcatch is a free application for capturing the data. However, you will need a valid Pix4Dcloud or Pix4Dmapper license to upload it to the Pix4Dcloud or extract the raw images from the app.