Q. Is there a way to make EmEditor move through document tabs in sequential order from left to right?

Yes. Select Customize on the Tools menu, then select the Window page, and clear the Switch to last used document for Next Document check box. When unchecked, you can switch between the tabbed documents in order from left to right, or right to left, using CTRL + TAB, or CTRL + SHIFT + TAB respectively. When checked, pressing CTRL + TAB and CTRL + SHIFT + TAB, switch back and forth between the active document and the last viewed document.