This is a website for free IFR flight planning. It costs no monthly fees like severla others. Som weof thes ecommercial onlöine products really are expensive, imo. I mean, we are talkign about a game planning tool, not real life needs.
Skyvector has a nice map and interface.
https://skyvector.com/
For saving files, you need to create an account, but the printout of the navlog with all course data and waypoints and frequencies can be printed any time. It serves you good compared to the default planning toy that FS once again is equiopped with as default. Thei8r included flight plannign toys always have been just, well, toys.
I hope that Aerosoft Flight Commander will see a new incarnation. I loved to use it in FSX.