sorting / filtering references

I am testing Biblioscape prior to purchase. I have imported my Reference Manager database with just over 10,000 entries and am having problems filtering and/or sorting my reference list. Neither seem to work. The manual doesn't seem to cover these navigational issues. Please help

To boost performance,

To boost performance, Biblioscape will switch to grid mode when the number of references exceeds 10,000 under a single folder. You can two options. You can divide your references into several folders. Or you can go to the Options window, under the "References" tab, change the grid mode number from 10,000 to 20,000.