There are two options to increase the number of rows that dbFront's Quick-Import functionality can handle.
Option 1: Increase the thread execution timeout.
By default, the thread execution timeout is set to 110 seconds for Dotnet applications.
You can adjust the thread timeout by merging the following into the file [c:\inetpub\dbFront\web.config].
<httpRuntime executionTimeout="180" />
Option 2: Allocate more resources.
Because this is a VM, one of the easiest ways to boost the performance is to allocate more memory or additional processors.
Can you verify that you have at least two CPUs and 8 gigs of memory allocated to this VM?
Newer versions of dbFront include that information in the server statistics but your version is a bit older.
This affects how much dbFront can process in the allocated time.