Syncovery is now in the QNAP AppCenter. However, the version on this page is usually more recent.

QNAP packages v11.15.4 for installation with AppCenter:
 
QNAP Intel/AMD 64-Bit Package  QNAP Intel 32-Bit Package
 
QNAP ARM 64-Bit Package  QNAP ARM 32-Bit Package
 

Now over 50 Languages included.


Additional Available (Optional) Component: