All of my projects have be re-scaled!

Hi,

Over a month ago I recorded a host of training material, mostly screen captures. I didn't render it at the time as we still didn't know how it should be packaged and presented. 

I've came back to it yesterday and every project has been re-scaled. What I mean by that is every clip/edit has been increased by approx 10% on the width, chopping off 5% off the left and right hand edges of the screens.

The only way I could see to sort this was to reduce the screen width by 10% using the scale tool. 

However, you can't do that en-masse. Instead you have to manipulate each clip, and there are 10's of thousands of clips. 

To add insult to injury, after I painstaking spent hours fixing one of the videos the screen size still jumped around very slightly.  When I looked at what was wrong, I couldn't see anything, and to fix it I had to take the slider from the 90 setting that I'd used to get the videos back to a useable state, move it to say 92 and then move it back to 90. That suggests that there is a degree of scaling I can't see.

I figure if I can just rescale the whole lot in one go the second issue won't occur, but I can't see a way of doing it.

Any help would be much appreciated. I need to get these rendered by the end of the week, and based on yesterday debacle I'll be at it for a couple of weeks.