[Kentrat]

Back again TDW, I have successfully started new campaigns both with and without silentotto and here's the entry you mentioned:

00000253 69.33457947 [1908] TDWMouse constructor
00000254 69.66361237 [1908] Page main InitializeScript
00000255 69.82371521 [1908] Menu InitializeScript
00000256 156.88265991 [1908] Start Campaign Screen
00000257 170.72637939 [1908] CTrackTag::Flush(): Could not send tag!
00000258 492.44424438 [1908] Page event camera InitializeScript
00000259 492.97311401 [1908] Page layout InitializeScript

so the problem is specifically loading previous saves; I reloaded my previous profile with 6_6_0 and they work with that; I also created a 6_7_0 test profile with exactly the same loadout/order and no joy loading the saves so it does seem to be a 6_7_0 change that is the issue.....

I used the migrater and copied my custom menu.txt with latest changes copied from yours.

Perplexing as I have migrated successfully from older editions