Our system got affected by virus which deleted some of the exe files. I'm missing alwin.exe, srwin.exe and sample data exe files for all modules.

I was hopping to run an latest update to restore EXEs but it won't install it referring to those missing files. When I tried to reinstall my originals it said I have newer version and install couldn't be completed.
We need to restore Adagio without loosing data.

Can you assist me with this please
Thank you