So there's a few different types of VPN connection methods.
1) PPTP - insecure, largely phased out at this point. (developed by MS/Cisco)
2) L2TP (usually with IPSec) - Good, your RV345 supports it. Most universal VPN
3) SSL VPN - Cisco AnyConnect/other proprietary implementations. Simple and has some cool stuff like web portal sign in. Apps.
4) SSTP - Microsoft's successor to PPTP (pretty good but restricted to Microsoft devices) *not on the RV345
5) OVPN - Good but usually requires third party clients. Common with VPN Providers like PIA, TunnelBear *not on the RV345

There all good choices except for PPTP. SSL VPN usually requires an ongoing subscription. OVPN support is limited. SSTP is largely a Microsoft only protocol. L2TP has broad support and integration across many platforms and devices.

In your case, you have to decide between SSL VPN (AnyConnect) and L2TP/IPSec. Since you only plan to use it in a limited capacity, I would just setup the L2TP Server on your RV345 and use the built-in Windows VPN client.

I'll send you a PM.