Here is the documentation to reset to factory defaults.. https://www.cisco.com/c/en/us/support/docs/smb/routers/cisco-rv-series-small-business-routers/smb4347-reset-to-factory-default-settings-on-rv320-and-rv325-vpn-rou.html  

Yes, this is doable.. From the Cisco documentation: https://docs.amp.cisco.com/en/SecureEndpoint/Secure%20Endpoint%20User%20Guide.pdf IP Isolation Allow Lists An IP isolation allow list lets you specify IP addresses that the Secure Endpoint Windows a...

ISE 2.6 will not blow up after the eval time expires.  It will continue for a short while but will remind you that it is expired and needs a license.  How much longer do you need?  I would suggest as mentioned above to reach out to your Cisco partner...