I do not believe I voted to close your question yesterday, but I did see it (and commented on it).
Ramhound found that the software documentation, available online from the publisher, gave instructions answering the question as you asked it.
Your question did not mention multiple instances, and the "however" link you shared in response to the found documentation indicates that multiple instances have a clear delineation, via "named instances", which your question also did not mention. Not until some further edit did you note you were trying to do a clean install, but taken together with the rest of your comments, it is still not clear if you want a "clean" install or to maintain your config, because a "clean" install strongly implies you want to remove/reset any existing config.
As it stands, the answer given that points to the Voidtools documentation still answers the question that you've asked, and therefore still indicates you have not done the "homework" we hope is done beforehand.
AN ASIDE: This site is run by volunteers, not employees. We expect that someone puts forth some effort in research and self-attempts prior to asking questions here, because what is being done when asking is that you are asking the community to put forth effort on your behalf. When someone has already tried things, and demonstrates and documents that effort, their questions are more likely to be well received, not least of which because the community knows what not to suggest, and won't have to resort to simply suggesting "read the manual".
Your current question has more information, but this additional information has made things less clear, and still doesn't give any sort of strong evidence your question has not already been clearly answered by the documentation from the publisher. It seems to me that your should take a good backup and simply follow the steps in the documentation. If that works, great, you've answered your question. If that doesn't work, now you have more, better, clearer information we can work with to get you a good answer to a better question.