I last reinstalled BD in about 15 minutes.
See here:
https://www.mobileread.com/forums/showthread.php?t=11786
and the wiki for advice.
I tend to use BD as it works well on lit files for me. If it's been ok for you then it might ultimately be simplest to reserve an hour, fix a cooling drink, put some soothing music on, and just try installing it.
If you decide to do so, then post any problems and someone will try to help.