After a Google search I tried opening the file with Notepad to edit as recommended in the following FAQ "Why do I get "Error: not well formed (invalid token) at line x"?"Error: reference to invalid character number at line 57.
http://manual.audacityteam.org/man/faq_errors.html#nwf
My interpretation was that I need to remove "��" from two lines where it appeared as below
<wavetrack name="�� Campfire On The beach Ambience - 8 Hours Relaxing Ocean Wave Sounds Calming Crackling Fire Sound"
After doing that and saving in Notepad, when double clicking the .aup file to open it I have the following message:
Anyone could help / knows what I'm doing wrong?"file name" is an audacity project file. Use the 'File > Open' command to open Audacity Projects.
Thanks in advance for your help.
FYI my PC is Win10