Change perfect-matched segments and re-pretranstale

Dear experts,

I'd appreciate it if anybody could point out where I'm mistaken or suggest a suitable workflow in the following situation.

I created a project with 12 files in it. I pre-translated it (8-10%) and continued translating the rest. While translating the 1st file, I had to change what had already been insterted as perfect match here and there. Is there a way to make these changes appear in all of the 12 files? I tried to run pre-traslation for the whole project as well as for the individual files, but it took no effect.

I'm running a Studio Pro 2011.

Thank you very much in advance.