Runtime error 75: Path/file access error occurs when something within your system is preventing Stockmarket Plus from Launching. We normally find that this is the antivirus software which is in place on the machine in question, I would strongly recommend suspending the antivirus service/s you use on the machine for a short time, and reattempting to open Stockmarket Plus. Should this resolve the issue, you can then create exceptions for Stockmarket Plus within your antivirus service to ensure that this error does not occur again in the future.
Should the suspension of your Antivirus service not resolve this issue, this indicates that there is another process in place within the device in question which is preventing the software from launching, and will require you to review the device further to discern what software could be preventing Stockmarket Plus from launching correctly.