I run Logos 8 on two Windows machines. The first is Windows 7 with hex core processor, 64 Gb RAM, and SSD. Similarly bad performance. 3+ minutes to become usable and then it is just usable. Second machine is Windows 10 with quad core processor and 32 Gb RAM, and non-SSD. Better performance, but not great and not nearly as good as Logos 7. Is there any