BUG - Fixture IDs renumbered when opening shows from previous versions of Hog 4.

I have a client with showfiles that they are trying to open in the new 3.6.1 software and the User ID/Fixture IDs are rearranged.

So 201-204 becomes 204, 200, 201, 205, etc. The fixtures stay within the fixture type (100 is within 100s, 200 within 200s, etc.) but it seems you should be able to open showfiles without your fixtures being renumbered.

Is this a bug with the auto numbering that was introduced a few revs back?

I know a possible work-around is opening a new show and merging the old show into the blank show. Unfortunately there would be a lot of shows to merge for all of us if that is the case.