When an user tries to install MapCature V8i (SELECTseries 4) application the error message is shown: “Another version is already installed. You must first uninstall it in order to install this version”. An user had uninstalled all Bentley products, even removing them from Regedit, but the same error still is shown on installing MapCapture.
Try to install the previous MapCapture version (run the install as Administrator) as it was before and then uninstall it (run uninstall as Administrator) again. Install the newer (the latest) MapCapture version.
If the issue still is appearing then check if the folders below exist on the PC, if they still exist – delete them from the PC (it is supposed that the previous MapCapture version was installed on the default location):
C:\Program Files (x86)\Bentley\MicroStation V8i (SELECTseries)\,
C:\ProgramData\Bentley\MicroStation V8i (SELECTseries)\,
Install the latest MapCapture version again on the PC