Lost all historical Fund prices last night

Ray Wall
Ray Wall Member Posts: 2
Hi, When i did the one step update last night I lost the historical prices for various funds that I have manually entered periodically since 2003. This is an issue as I have lost all performance records and DRP prices, which obviously has CGT implications. I did manage to find a previous version and download these historical prices as a .txt. Is there any way these can be uploaded back into the active file so I dont have to re-enter manually.
Any idea why this would happen. I was working on data through Qsync server.

Thanks in advance. Ray