Hi OldTrawler you must ensure that theres no fragments of you old install ensure its all deleted.
then install the SH3 Download from the Link i sent you make a Games folder on Drive C:/ but outside program/Files x86 once downloaded and unpacked in your Games Folder run SH3 and just start a single mission that makes a SH3 Folder in your documents for all your carrer saves once you know your new SH3 Works then Mod it as you see fit.
you may need to install the 4Gig Patch download Link Below
https://www.subsim.com/radioroom/dow...o=file&id=5737