Here is the answer that I obtained after that I have written to the technical support :
" Currently it is not possible to merge duplicates. You will need to remove
the double entries manually. To do this, please select the card of the
individual and go to the Person menu > Person > Delete Person. "
I have found the ideal solution and it is free, When uploading any files you allways have the potential duplicate problems The solution is to go on to the Mormon Church Family History Website and download their Geaniology software prograhm. This prograhm has the facilities to tell you what duplicates are in your data and allows you to correct the problem. Set up a file and export your gedcom data to this file. Then download it to your new Prograhm that you have just downloaded. When you have completed the merging of duplicates just do the transfer in reverse and transfer the sorted data back new updated family tree site into your Hertitage or other soltware prograhm. I do this excercise regularly as it keeps your research nice and clean.
This is much easier to clear up your duplicates than trying to do it manually. The problem with doing it manually is that it is impossible to find all your duplicates especially if you have a large tree.
I uploaded my GEDCOM file a while back and now I'm ready to replace it with an updated version but nowhere on the site can I find how to do that. Do I have to delete the old one and replace it or is there a way to upload and replace the old info? Any help would be most appreciated. Thanks in advance.
I would also like to know as the data I have on my site is over 2 years and some have wrong dates etc
Just updated my data. I simply imported the new GEDCOM, then open the family tree. When the window opens you will see at the top right corner of the tree window (which family tree to open) use the arrow to show all your trees then select which one to open.
Make sure you name the new GEDCOM slightly different than the older one.
To delete the older data press the Family tree button then click on summary , that will open your list. Down the right side under Actions click the option delete.