Blynk rf remote

I was using Blynk rf remote using (ESP 8866E) more than two weeks with out any problem,but few days before it stared to give error, now I re installed blynk again, shall I use the same program with auth code with out re programing again

Yes, if you didn’t delete dashboardm no need to reprogram.

I deleted the dashboard, its OK, in future is it possible to keep a feature to back up the dashboard setting?.

Yes, someday we will do that.