don't panic - shouldn't be too big a deal to recover here, as
long as you have good records to verify the topics and folders you
need to recreate on your project. I've been here myself, and lived
to tell the tale!!
If you created new folders in your project after leaving your
old computer, create the folders again in your older version, with
the same names, in RoboHelp.
Import the html files that have been created since the
transition into the appropriate folders (new or pre-existing) using
the RH import function --> Right-click on the folder that should
contain these new topics, select Import from the right-click menu,
and navigate to / select the topics to import. You should be able
to navigate to the server where these new topics are happily
residing as part of the currently published WebHelp. But if you
can't get to them, have your IT folks help you copy them to a
location you can reach (you can even put them right into the
correct project folders in your RH project) and then import them
into the project. This is one of those instances where you may have
to do a little work in Windows Explorer rather than completely in
RH.
If there are topics that you updated in the new system (that
existed on the old computer), you can import them as well, and let
them overwrite the older version of them, using the same Import
function.
remember to update your TOC, your index and glossaries, etc.
You might have some broken links here and there to resolve, but
again if you have kept good records and pull back in all the new
and changed topics, you should be able to fix them easily.
Before you do ANYTHING, make a backup of the older project
environment.