Try to run `goodbyedpi.exe -1 -a -m` first. If you can open blocked websites it means your ISP has DPI which can be circumvented. This is the slowest and prone to break websites mode, but suitable for most DPI.
Try to run `goodbyedpi.exe -1 -a -m --dns-addr 77.88.8.8 --dns-port 1253` first. This is the most hardcore mode which will show if this program is suitable for your ISP and DPI vendor. If you can open blocked websites with these options, it means your ISP has DPI which can be circumvented. This is the slowest and prone to break websites mode, but suitable for most DPI.