I think you may need to uninstall ds 4.0.3 pro 32 bit ver too,
if you use ds 4.5 ver
because “ds 4 .0.3” and “ds 4.5” can not use same one cms (database)
without trouble in one PC HD.
when I tried to install 4.5 64bit RC ver with 4.0.3 32bit,
many same orphaned files turn up ,and each pointer of dsf and duf mixed.
so if I click some file, it could not load correctly.
before I installed both of 32bit and 64bit of ds 4.0.3 and used them together,
since 4.0.3 32 bit ver only have free rip-sync plug in.
but about 4.5, I think 4.5 32bit ver have not free lip sync too,
so if you use 4.5 64bit ver , you need not install 4.5 32bit ver I think.
(but if you keep both , you can test them when met some trouble I feel)
(if there are some better points about 32bit ver, I will install it too,,