As long as the antenna covers the right band(s) for the channels in your area, the elements are still attached and nothing is broken it probably will work fine. Like Boba suggested, check out the TV Fool site for this reference. An antenna is an antenna, is an antenna, is an antenna. No need to upgrade unless TV Fool shows differently.
Have you considered renting a bucket lift from a local equipment rental facility (Home Depot, etc.)? These are trailer mounted (easily wheeled into back yards/tight spaces) and 40' is within the reach of most.
All you will need is some penetrating oil (for stubborn old connectors), a 300 to 75ohm outdoor transformer/balun, nylon ties, pre made rg6 coax (or coax, connectors, stripper tool, compression tool), ground block and wire to connect to house ground.
Easy task to work from a bucket! Maybe a local handyman has a lift bucket? Tree trimming service? You don't need a pro to replace a cable.