Follow these steps to change the order of your artboards:

1- Log into your Simplified account with your email or Google/Facebook login.

2- Go to design section and open a new or recent project.

3- Open the timeline view by clicking on the artboards button in the lower left corner of your screen.

4- Click on the stacked dots icon in the lower right corner to arrange the artboards.

5- Select the artboard you want to rearrange and drag it.

6- Click on the small x icon to close this full screen view and that's it!

Now you will be able to see your artboards reorganized the way you wanted. (Remember that if you don't see the change immediately you can refresh the page and the changes will be reflected).