AVG TuneUp

I was encouraged by AVG TuneUp to try Uninstall Simulator for a list of programs. By mistake I chose to simulate my e-mail program, Mozilla Thunderbird. I really regretted this, because even though I have installed the program again, all my local files in the program seem to be lost. Since it is only a simulator, I expected to be able to restore it, but it does not seem to be the case. Is there any way I can do that?

Best regards Thora Heegaard