I will ask for a confirmation, but in case you have missed the announcement, Cubase 8.5 will be the last Cubase version offered in both 32- and 64-bit.
[Edit: However LASA only applies to 32-bit programs running on 32-bit systems. In your case, you are limited to 4GB, not 2GB. So, it’s down to rendering to audio or using jBridge]