Running hippo's test on Windows 10:

\test>perl test-unicode-sqlite.pl
1..14
ok 1 - Creating database a/databaseTest1.db
ok 2 - Created table data
ok 3 - Disconnected from a/databaseTest1.db
ok 4 - Database file exists
ok 5 - Reconnected to database a/databaseTest1.db
ok 6 - Results set obtained from a/databaseTest1.db
ok 7 - Disconnected from a/databaseTest1.db
ok 8 - Creating database ⁿ/databaseTest2.db
ok 9 - Created table data
ok 10 - Disconnected from ⁿ/databaseTest2.db
not ok 11 - Database file exists
#   Failed test 'Database file exists'
#   at test-unicode-sqlite.pl line 22.
ok 12 - Reconnected to database ⁿ/databaseTest2.db
ok 13 - Results set obtained from ⁿ/databaseTest2.db
ok 14 - Disconnected from ⁿ/databaseTest2.db
# Looks like you failed 1 test of 14.

test>dir  ü
 Volume in drive C is Win10
 Volume Serial Number is D27E-5B7F

 Directory of ...test\ü

11/08/2017  09:36 AM    <DIR>          .
11/08/2017  09:36 AM    <DIR>          ..
11/08/2017  09:36 AM             2,048 databaseTest2.db
               1 File(s)          2,048 bytes
               2 Dir(s)  813,772,779,520 bytes free
[download]

So - this looks like a perl filesystem api issue, but hippo's code is able to reconnect.