You need a new Dual stroboscope ring for your 701 or 1229 but they are too expensive and you are not ok with spending over 20 Euros for it? Print your own one!
Dual stroboscope ring for Dual 701 and Dual 1229

Install Guitar Pro 6 on Linux

You have trouble to run Guitar Pro 6 on newer Ubuntu (18.04), Linux Mint (19) or other Linux distributions because of libssl, libpng or libz? Maybe this howto will help you:
How to install Guitar Pro 6 on Linux 64 Bit