UPDATE:
Reinstalled x86 then downloaded x64 PlexMediaServer-1.32.3.7089-b0a36929b. Uninstall of x86 worked correctly and it installed 64 fine.
ORIGINAL:
PlexMediaServer-1.32.3.7089-b0a36929b
Server Version#: 1.32.2.7100-248a2daf0
Player Version#: 1.68.2.3746-7601b337
Win10 - issue occurring on 2 different machines
Tried to update from 1.32.2.7002-86cfcc10c within Plex. Appeared to not do anything. Downloaded PlexMediaServer-1.32.2.7100-248a2daf0-x86_64.exe and tried to install manually. Message that 32-bit version was installed so it will delete and install 64-bit (this is incorrect, only 64-bit currently installed). Error message that it could not uninstall. Uninstalled manually. Reran installer and still received message 32-bit was installed error so now have no server on machine. This also occurred on a second PC with my main server but luckily I did not delete it from that machine.