You better read and understand your umbrella policy very carefully.For most of my professional career I have carried an Umbrella Liability Policy with a professional coverage rider. The policy covers both personal and professional liability. Considering I occasionally use my tractor to do things like fix the pastor's garden, mow hay for a neighbor etc and that requires driving the tractor on the road, should I maintain this policy? None of the jobs are for pay, we either swap work or it is just to help a friend. The policy isn't expensive on an annual basis.
Keep that policy in effect. You never know when or where something may happen. Even good friends can turn on you in a heartbeat when $$$ could be involved (even when just doing a favor or for free).
Insurance is one of those things you should shop every couple years. Companies are always giving discounts to attract new customers but do not give the same discount to current policy holders.