If you can lower the anchor using the winch control buttons (without free-falling), but not get up, I would suspect faulty switch and/or connector rather than blown breaker / fuse.
On our B40 (same vintage) the has a general purpose C13 / C14 connector between handheld switch and winch. This connector type is not so well protected from water ingress / corrosion, so it is quite likely yours has had some damage.
BR,
Tommi
s/y Anniina