If I create a project (with a name like "I'll be darned") using the start screen it does open. Once it is saved it will no longer open from the start screen.
edit: this was just tested with IPswitch.
The error I get is that "d:\audio\cakewalk projects\I" was not found. So at this point it is evaluating the path to the file not just the file name.
Opening and saving the file in Ipswitch does not correct this issue.
edit2:
I renamed the folder that the project it in and now get the error that "d:\audio\cakewalk projects\ill be darned\i" can't be found.
And this is a file created using the start screen.
Edit3:
Ok. just for grins I disabled the firewall rule I have blocking sonar for internet access. I tested again and it indeed does open the projects and does not truncate the file name.
I am not inclined to leave the firewall rule turned off because it increases the start time of sonar from the 3-5 second range to 20-25 second range.
I hope this helps narrow down where the problem is.