Performance issue with large data model

Hi All,

Our ER studio is installed in a Windows 10 virtual machine with 8MB ram. I use it to open a 30MB .dm1 file contains a main model with about 1500 tables. Everything runs so slow. The .dm1 file is created by another company, and so they should be able to work with it. Does anyone has suggestions for me to improve the performance of ER/Studio in this case?
Thank you.