FWIW, you can't just "install TWS for a different server". No matter which gateway you select at startup, your account is homed on a particular server group (US, HK, CH), and that's the group that TWS will get redirected to.
The key may be to have another account that is homed on another server. Or a backup broker whose systems and location are as disparate from your primary broker as possible.***
So, was anyone whose account is homed in HK or CH able to place e-mini trades starting at the beginning of the GLOBEX session (at 2045 UTC) on Thursday?
***FWIW, TerraNova, being Chicago-based, was not disrupted Thursday, at least with regard to the products that trade in Chicago (i.e. CME) - I didn't ask about other products.