If you want to get the chord Labels into Audacity the labels are simple txt files
start time sec - start time sec - name

Code:
0	0	Fm
2	2	C
3	3	Bb
5	5	C
7	7	Fm
10	10	C
11	11	Bb
13	13	C


Biab will export to ABC Notation txt
a script could be made to convert the ABC into Audacity Labels just so long as there are no tempo changes.
z8 = L: x 8 so 8 1/8 and you get the time by calculating the tempo and beats.
Code:
X:1
T:"PopShining" RealTracks with "Held Chords" Guitar
L:1/8
K:F  
Q:1/4=120
R:Shining Pop w/ Held Guitar
M:4/4
| "F" z8 | "C" z8 | "Bb" z8 | "C" z8 |
| "F" z8 | "C" z8 | "Bb" z8 | "C" z8 |
| "Dm" z8 | "C" z8 | "Bb" z8 | "Gm" z8 |
| "Dm" z8 | "Bb" z8 | "F" z8 | "C" z8 |
| "F" z8 | z8 | "F" z8 | z8 |
| "Gm" z8 | z8 | "Gm" z8 | z8 |
| "Bb" z8 | z8 | z8 | "Bb" z8 |
| "F" z8 | z8 | "Gm" z8 | z2 "Gm" z6 |
| "F" z8 | z8 |