The search path is just a string of places for it to look for the target of the search. I keep my 32-bit plugins separate from my 64-bit plugins because I do not want to have 32-bit plugins in 64-bit Sonar, as a rule. The select few that I allow to be present are placed in a dedicated folder that is made available to both my 32-bit Sonar install and my 64-bit Sonar install as well.
If you are having noises, such as pops and crackles and such, that is a different matter. You may have to increase your latency a tad to make them go away, and it is also possible that the nature of plugins that you have loaded into your projects may also be introducing some extra problems, such as plugins that are either CPU-intensive or that use look-ahead processing.
You may need to go through the process of isolating which one or more of the plugins is causing these problems, and see what the nature of that plugin is - possibly swapping out for a different one.
Bob Bone