I just started a new game specifically to play Rigmor of Bruma and Beyond Skyrim Bruma. Other than those two mods and the patch for BS Bruma, I just have the Unofficial SSE Patch loaded - everything is stock standard vanilla. I completed the main quest line up to the start of Diplomatic Immunity, mainly to level my skills a little before I venture off with Rigmor. Went to River Wood, talked with Baa'Ren-Dar and set off to Angi's camp. Just past Helgen the game CTD. Went the other way past the Lake View Manor location, turn to Falkreath. Just passe the "roadside ruin" the game CTD. Went even further west pass the Glenmoral witches's cave and turn in for Falkreath - Same issue, CTD. Desperate at this point I used the console command "coc angiscampexterior" - CTD. I disabled Beyond Skyrim Bruma and the patch. With only "rigmor" loaded, same issues at same locations. I disabled Rigmor, and with no other mods (except USSEP) active, I had the same results. I then went back and verified my files on Steam. Of course all the edited Master Files where no "dirty" again. Without cleaning the Master Files with SSEedit and without activating the two mods, I made clear run to Angi's Camp with no CTD instances. Activated the two mods and the patch, and where able to play without any issue. Are there any advice on cleaning Master Files or not with SSEedit if I want to continue playing the character? After I finish Rigmor and BS Bruma I want to continue playing the main quest together with "Legacy of the Dragonborn, but are not so sure how that mod will work with dirty Master Files.