There can be a crashing issue with the 6.1.6 r11637 rev of Guitar Pro 6 for some users. To resolve this issue please complete the following steps to attain a new stable version.
Launch your Guitar Pro 6's updater, and if the 6.1.6 r11681 version is available, download it. If not, continue with the following steps.
Recommended: Turn off your UAC if you are using Windows Vista, 7 or 8.
1 - Uninstall Guitar Pro 6.
2 - Make sure to run your computer from an Administrator account.
3 - Make sure that your antivirus, firewall, proxy or router are all well configured to accept the Guitar Pro 6 installation.
4 - Download the following Guitar Pro 6 installer:
5 - Make sure you keep 6.1.6 rev 11681, or higher, installed. Do not revert back to, or before, the 6.1.6 rev 11637 version.