Notes about the UAS file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The UAS file type is primarily associated with 'PhotoImpact' by Ulead Systems, Inc.. PhotoImpact is a complete digital image-editing suite from Ulead. The UAS file is produced periodically as a backup of the current project and if the program terminates abnormally you can use this file to get back to the place you were at when that happened.