I didn’t learn them at the same time, but concentrated on one language at a time. Have you ever heard about the intelligible input theory of Dr. Krashen? You just need to increase the language input like watching Youtube videos or TV series. In this way you will acquire the language unconsiously.
I use GoldenDisct-ng as well, but with the mac OS 11 build. Are you using the latest windows version? Do you have the same folder structures as downloaded? Did you compress the audio files? If yes, in which folder did you put the zip file? Again, thanks in advance.
I use Manjaro Linux. It works fine. The .mdx dictionary should NOT be added as an audio file. You simply need to index it as a normal dictionary… Mac sucks! It might be a problem with MacOS… I do not know. If so, please open an issue on GitHub to see if Xiaoyifang can solve it.