Hi Hypaepa,
I’m glad you were able to get things sorted.
That is correct. With the pro version when you click on the Tiny MCE button in the toolbar you’ll be presented with your timeline and categories that you can select from, and will generate the necessary shortcode for you.
If you wanted to display a single timeline with all of your announcements and the dropdown filtering like in the demo, you would use the following shortcode:
[timeline-express filter="1"]
You can read more in the documentation:
https://www.evan-herman.com/wordpress-support/timeline-express-pro-documentation/
Also, you may want to enter your support key into the input field on the support page. Once entered you’ll have the ability to submit support requests from within the plugin directly to our support ticketing system to prevent your question from going unanswered.
Thanks!
Evan