All Mangas Reader

So, went online today and saw that my entire manga list had been deleted. I went through the app and saw that everything was gone, except in the My stats section which had a complete list of the manga. It even showed the manga that I had read last night. Does anyone know why this happened and is there any way to retrieve my original list without having to go and re-add everything one at a time?

Can you make a further explanation about what happened before, when you found the problem, version of Chrome and AMR.

Meanwhile you can check chrome-extension://nhjloagockgobfpopemejpgjjechcpfd/importexport.html to make an backup of your list.

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Basically like I said, I turned off my computer the night before, I had just finished reading the newest chapter of GANTZ, next day I turned on my computer and my app which had previously had 7 manga to read was at 0. So, I checked the app and nothing was in there. At first I thought the entire thing was wiped, especially when I looked at the Import/Export and nothing was in there, and then just looking around I went on to the "my stats" section and everything was there. So I figured if everything I had read was in that section, there might be a way to retrieve the list without having to go and re-add everything(which will take a lot of time).
My Chrome version is 20.0.1132.47 beta-m
My AMR is 1.3.14

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Thanks for the help, I actually just finished going through and re-adding everything...it took a while, don't ask how long. Hopefully, I won't have to deal with that problem again, If I do I'll try that.