Instead of a button, I modified the handling of miner errors to automatically switch over to an alternative miner if the preferred miner has repeated problems with a particular algorithm. However, the software does wait a few minutes before identifying the situation you had with the miner not being able to find a result as quickly as it normally does.  Those situations are not as obvious as communication failures or miner executable crashes, so the software has to analyze the miner output for a while to determine that a problem is actually occurring.  Then, the software will attempt to restart the preferred miner a few times because the preferred miner is usually the fastest and most profitable to use.  But in worst-case scenarios, Hash Auger will now use an alternative miner if the problem keeps occurring with the preferred miner. Of course, this only applies to algorithms that can be mined with more than one miner.