track panes not there?

hello,
all of the projects that i created on the sonar vs production pack prior to upgrading to x1pe, have no track panes at the far left in the track view. it is only the tracks themselves on the screen. i don't know how to get get them back. does anybody know how?
thanks.

Try hovering your cursor over the left or right side of the grey bar to the extreme left of the track view. If it changes to two double lines with arrow on the right and left you can just clik and drag the right side of the grey bar and that should reveal the track headers/pane.