...
QAS v8.0.0 must be installed with the same database management system that QFD is using.
Upgrade your QFD to v4.3.11.
Ensure that you must have access to:
QFD database
SVN if it is integrated with QFD project artifacts
QAS 8.0.0 database
The project path must be updated with the latest versions of test cases and tasks.
Plan the migration process as it might take more time for large projects.
Perform the project migration on a machine with at least below configurations for better turn-around time.
RAM - 16 GB
Quad-Core Processor
Free Disk Space - 5GB
...