Hi Eric,
We rewrote the download module in v4.1 and it seems we broke the timeout setting for long lasting downloads. The default execution timeout setting for ASP.NET is 110 seconds. Your tester's download stopped at %32 possibly because 110 seconds had passed.
Please download the fixed DLL and replace the old one with it:
Fix 1 for FileVista v4.1The fix is included in the v4.1 download packages as of writing this message. Users who will download the product after today, do not need to apply the fix.
Note that, you can also avoid this problem without applying the fix and by only adding/editing a web.config setting:
<httpRuntime executionTimeout="7200" />
executionTimeout is given in seconds, where in this example it's set to 2 hours. However this setting effects the whole application rather than only download module so I recommend you to use the fix instead.
Let me know the results.