SyncTrayzor has a portable installation 
If you want to go ahead and do things manually, a couple of criticisms:
Just ship 32-bit: it runs fine on x64- Don’t redefine APPDATA - use the
-homeflag to Syncthing
SyncTrayzor has a portable installation 
If you want to go ahead and do things manually, a couple of criticisms:
-home flag to Syncthing