> 2. Fix aliases.conf *in your Firebird host root directory*: entries should look like this:
> XFILES = C:\DATI\FB\XFILES.FDB

In addition, since Walter wrote he does not have too much experience
with W7 and upwards, you will usually use Notepad.exe to edit the
*.conf files.

It is probably good to know that Notepad.exe does never have the
permission to write into a protected directory, not even when it is
run as administrator.

If you can edit, but not save such a config file, just save it
somewhere else, and then use copy+paste to replace the original with
the new version of the file.