Notes on the X-Plane v810 format support.
X-Plane v810 format is now supported, in addition to v715 format which was already supported.  TaxiDraw will save or export the same format that was originally loaded for the airport being edited.  Hence you cannot currently use it as a format converter, but can edit and save both formats.  Missing glideslope angles for v810 runways or taxiways (the addition in v810) do not crash the program but instead are assumed to be zero.  Hence you can convert a .dat file containing 1 custom airport from v715 to v810 by inserting 810 as the initial line of the file, and just putting in the angles for runways with glideslopes.  The 0000.0000 for taxiway and other runway entries will be assumed by TaxiDraw, and written out properly on next save.  Hopefully that makes some sort of sense!  Data files containing more than one custom airport would have to have each airport loaded and re-exported to the file, since the data lines for the non-edited airports are simply passed through without editing.  For .tpj files, 810 would need to be added immediately after the [AIRPORT] marker.  As an alternative to adding 810, simply add a glideslope angle (0000.0000 allowed) to the first runway line, and v810 will be assumed.
Example: the v715 project in (a) will be saved identically to (a) if loaded and re-saved as is, but if changed to (b) OR (c) in a text editor and loaded in TaxiDraw will be resaved as (d).
(a)
[FORMAT]
X-PLANE
[END-FORMAT]
[AIRPORT]
1    138 0 1 EGBN Nottingham
10  52.919861 -001.077917 09x  88.37   3482  699.0397    0.0000   98 121121 01 0 1 0.25 1
10  52.919862 -001.076528 03x  28.83   2659    0.0000    0.0000   75 111111 01 0 1 0.25 1
10  52.919266 -001.080319 xxx 326.60   1320    0.0000    0.0000   70 111111 02 0 0 0.25 0
10  52.917795 -001.081165 xxx 326.60    400    0.0000    0.0000   80 111111 02 0 0 0.25 0
14  52.918983 -001.080831  30.00 1 Tower Viewpoint
15  52.918991 -001.080431 238.00 EGBN Nottingham Ramp #1
18  52.920399 -001.077942 1 Light beacon
19  52.920265 -001.085859 1 Windsock
54 13487 A/G VOICE RDO
(b)
[FORMAT]
X-PLANE
[END-FORMAT]
[AIRPORT]
810
1    138 0 1 EGBN Nottingham
10  52.919861 -001.077917 09x  88.37   3482  699.0397    0.0000   98 121121 01 0 1 0.25 1
10  52.919862 -001.076528 03x  28.83   2659    0.0000    0.0000   75 111111 01 0 1 0.25 1
10  52.919266 -001.080319 xxx 326.60   1320    0.0000    0.0000   70 111111 02 0 0 0.25 0
10  52.917795 -001.081165 xxx 326.60    400    0.0000    0.0000   80 111111 02 0 0 0.25 0
14  52.918983 -001.080831  30.00 1 Tower Viewpoint
15  52.918991 -001.080431 238.00 EGBN Nottingham Ramp #1
18  52.920399 -001.077942 1 Light beacon
19  52.920265 -001.085859 1 Windsock
54 13487 A/G VOICE RDO
(c)
[FORMAT]
X-PLANE
[END-FORMAT]
[AIRPORT]
1    138 0 1 EGBN Nottingham
10  52.919861 -001.077917 09x  88.37   3482  699.0397    0.0000   98 121121 01 0 1 0.25 1 0000.0000
10  52.919862 -001.076528 03x  28.83   2659    0.0000    0.0000   75 111111 01 0 1 0.25 1
10  52.919266 -001.080319 xxx 326.60   1320    0.0000    0.0000   70 111111 02 0 0 0.25 0
10  52.917795 -001.081165 xxx 326.60    400    0.0000    0.0000   80 111111 02 0 0 0.25 0
14  52.918983 -001.080831  30.00 1 Tower Viewpoint
15  52.918991 -001.080431 238.00 EGBN Nottingham Ramp #1
18  52.920399 -001.077942 1 Light beacon
19  52.920265 -001.085859 1 Windsock
54 13487 A/G VOICE RDO
(d)
[FORMAT]
X-PLANE
[END-FORMAT]
[AIRPORT]
1    138 0 1 EGBN Nottingham
10  52.919861 -001.077917 09x  88.37   3482  699.0397    0.0000   98 121121 01 0 1 0.25 1 0000.0000
10  52.919862 -001.076528 03x  28.83   2659    0.0000    0.0000   75 111111 01 0 1 0.25 1 0000.0000
10  52.919266 -001.080319 xxx 326.60   1320    0.0000    0.0000   70 111111 02 0 0 0.25 0 0000.0000
10  52.917795 -001.081165 xxx 326.60    400    0.0000    0.0000   80 111111 02 0 0 0.25 0 0000.0000
14  52.918983 -001.080831  30.00 1 Tower Viewpoint
15  52.918991 -001.080431 238.00 EGBN Nottingham Ramp #1
18  52.920399 -001.077942 1 Light beacon
19  52.920265 -001.085859 1 Windsock
54 13487 A/G VOICE RDO