I had 2019 standard installed on my machine. Let it expire on purpose because I wanted 2020 professional. Tried to uninstall and had errors, but still bought the new 2020 and figured it would just be a new install. However now it won't install properly either says draftsight.msi location is not valid. How do I get a clean install on my machine? Paid for the darn thing and can't use it :(.