Applies to: ZWCAD 2017, ZWCAD Classic
After uninstalling old ZWCAD and try to install a updated new version, you may encounter trouble as following.
1, cannot continue to install ZWCAD.
2, "Install" button is gray
3, ZWCAD installation failed.
In order to resolve such issues, we need to delete some residual registry options manually, which are disturbing us.
1, With installation files you have (extract installation package), open "products.xml"
2, Search "RegPath", you can find multiple paths. Find them in REGEDIT (search key words like "26A7C767-A001").
Usually for 32 bit ZWCAD, "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall",
for 64 bit ZWCAD, "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall"
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3, Delete them and try to install ZWCAD again (reboot PC if necessary).
