> Possibly the <check reldir="…></check> fails on Windows?
Maybe it is the other way round and the command <check …></check> "fails" on OS X?
Changing it to (non-existent)
<check reldir="extensions">txt2foo.pl</check>
doesn't prevent the extension from being loaded on OS X -- i.e. the <check> command seems completely ignored and the input file format for *.txt listed anyway in the 'File open' dialog.
Changing the dependency check (to non-existent)
<dependency type="executable" location="extensions">txt2foo.pl</dependency>
prevents the extension from loading though (file type not listed).
> Possibly the <check reldir="…></check> fails on Windows?
Maybe it is the other way round and the command <check …></check> "fails" on OS X? "extensions" >txt2foo. pl</check>
Changing it to (non-existent)
<check reldir=
doesn't prevent the extension from being loaded on OS X -- i.e. the <check> command seems completely ignored and the input file format for *.txt listed anyway in the 'File open' dialog.
Changing the dependency check (to non-existent) "extensions" >txt2foo. pl</dependency>
<dependency type="executable" location=
prevents the extension from loading though (file type not listed).