I noticed that the Linux' "unrar" program has a problem with unpacking this content.info.rar file.
I have replaced the content.info.rar with content.info.tar on line 1780.
Unpack with "tar xvf content.info.tar"
As for the voices, I cannot reproduce your problem.
I just downloaded this:
Just to confirm that voices download is working properly here:
voice is portuguese_br_woman
Downloadsize of voice portuguese_br_woman is
Do you want to download the voice of portuguese_br_woman? y/n
--2015-05-01 11:02:25-- [Only registered and activated users can see links. ]
Resolving cdn.sygic.com (cdn.sygic.com)... 22.214.171.124
Connecting to cdn.sygic.com (cdn.sygic.com)|126.96.36.199|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 27677 (27K) [audio/x-wav]
Saving to: `Sygic/Res/voices/portuguese_br_woman/test.wav'
100%[======================================>] 27,677 --.-K/s in 0.006s