That's correct, the key lines from the latest AMP release notes:
Aruba Instant Support
- New Firmware Support
Support has been added for Instant 6.2.0.0-3.3.0.0 in AirWave 7.7.0.
Support has been added for Instant 6.2.1.0-3.4.0.0 in AirWave 7.7.2.
Support has been added for Instant 6.3.1.1-4.0.0.0 in AirWave 7.7.7. (Template-based configuration only.)
The 'template-based config' comment means that the Instant GUI Configuration mode (toggled on Group -> Basic) is limited to 3.2 through 3.4 at this time.