There are two packages for QNAP:

• The one you download from our website (http://xeams.com/XeamsDownload.htm). 
• Other that comes with QNAP

The one that comes with QNAP runs Xeams inside a container and therefore, it is a bit difficult to find the exact path. Try searching the /share/CACHEDEV1_DATA folder for GoodEmails folder. This is because the actual files are stored inside a container volume and the path is going to be different on every machine.

If you have downloaded the QNAP package from our website, the path will be  /share/CACHEDEV1_DATA/.qpkg/Syncrify