I also had this problem with the bagpipe-instruments after the competition and conteacted christian about this but it never got resolved.
I tried winrar and 7zip.
I use win10x64 (Build 1809)
4×8 Gb Kingston 2333 MHz ram; i7 7820x on a EVGA x 299 UD (rev.1) – motherboard and a EVGA GTX 1070 ti.
Storage is a Samsung 970 Evo 1Tb and a 970 Evo 500GB. Main Interface is RME FF UCX with latest drivers.
Don´t know, if DAW-/Kontakt-version is improtant.. I do not get to the point where this matters. BUT
Cubase 10.5 Pro and Kontakt 6. Latest version of both.