Hi, so you specified to use more memory? If this does not work then it is most likely because you do not have write access to the location where the openLCA ini is located (where the permitted memory is stored). To solve this, you can use the zip archive version of openLCA, extract it in your user directory, and run openLCA. You will then be able to change the openLCA ini (via preferences, in openLCA).
Hth,
Andreas