Because the locate feature needs some work @Hayo_NI
These were issues that were recently brought up to the Native Access team, so hopefully we'll see some fixes soon.
In the meantime delete the folder that you're trying to locate and eventually NA should realize it's not installed and let you install it again.
Please be a lot more specific as to what exactly is your problem. If you are referring to a.g. a third-party library or part of same then some third-party libraries require you to run the third-party installer and then afterwards point the Native Access to the install location using the 'Locate' function !