I too during 1st install cancelled autosync and everything appears to be working fine. I'm on W7 x64.
If i do run the sync it gives me these 4 files to download:
League,"Action","Type","Name","Last change","Size"
ReizaMarcas,"Sync","File","C:\Marcas\Support\Languages\Español.dic","16.10.2014 15:02:58","96,31 KB"
ReizaMarcas,"Sync","File","C:\Marcas\UserData\Petrobras\Petrobras.PLR","29.11.2014 14:45:55","25,47 KB"
ReizaMarcas,"Sync","File","C:\Marcas\Marcas Dedicated.exe","29.11.2014 14:33:58","0
ReizaMarcas,"Sync","File","C:\Marcas\Marcas.exe","29.11.2014 14:50:37","52,08 MB"