Is it possible to prevent sheets tabs from being copied to a new Excel workbook? I was able to use the copy sheet tab function in your trial version.
Go to tools, protection, protect sheet and then de-select the checkboxes for “select locked cells” and “select unlocked cells” put a password in (ensure the protect worksheet checkbox at the top of the box is highlighted). This should do what you want.
Be sure to disable access to VBA editor thanks to the corresponding XLS Padlock option.