EasyTravel is not a 'normal' application and generates it's own transactions to simulate traffic from around the world on a variety of devices. As such, injecting into it takes a slight additional step.
On the EasyTravel demo webpage, there's a section that describes how to modify EasyTravel config file to hook it up to your SaaS tenant.
Then scroll down to the "Connecting EasyTravel to Dynatrace" section. The file you'll be editing can be easily accessed from the EasyTravel Config GUi page. In the upper right corner, select the Gear and select "Show Properties", which will open the properties file in a text editor.
You may also have to change the config.apmServerDefault parameter in this same file. It should be set to "APM". I don't recall if this is the default.
Let us know if this works.
