Praat TextGrid reviewer script cannot be run repeatedly - wav

Question

I am relatively new to Praat and am currently using a Praat script to open all sound files and related textgrids in a directory, make changes on each textgrid and then saving the textgrid in the end.
This worked fine when I ran the script for the first time but I could not run it another time, neither on the same directory (containing files that had been reviewed before + files that had not been reviewed), nor on a different directory (containing files that had not been reviewed with this script previously at any point in time).
I am not getting any error. When I try to run the script now, the Praat information window opens and informs me that all files in the respective directory have been reviewed.
It might be important to note that I interrupted the script in the first run (thinking that I could simply take a note on where I stopped and work on the rest of the files later on).
I would be glad about some help here! Any ideas?
Here is the script I am using:
## text grid reviewer.praat
## Originally created by the excellent Katherine Crosswhite
## Script modified by Mark Antoniou
## MARCS Auditory Laboratories C 2010
## This script opens all the sound files in a given directory, plus
## their associated textgrids so that you can review/change the
## boundaries or labels.
form Enter directory and search string
# Be sure not to forget the slash (Windows: backslash, OSX: forward
# slash) at the end of the directory name.
sentence Directory C:/Users/Hansen/Desktop/annotate_latency/03_1_cond/
# Leaving the "Word" field blank will open all sound files in a
# directory. By specifying a Word, you can open only those files
# that begin with a particular sequence of characters. For example,
# you may wish to only open tokens produced by speaker 02 in context C01
# then you enter 02_C01.
sentence Word
sentence Filetype WAV
endform
Create Strings as file list... list 'directory$'*'filetype$'
number_of_files = Get number of strings
for x from 1 to number_of_files
select Strings list
current_file$ = Get string... x
Read from file... 'directory$''current_file$'
object_name$ = selected$ ("Sound")
Read from file... 'directory$''object_name$'.TextGrid
plus Sound 'object_name$'
Edit
pause Make any changes on file 'object_name$' then click Continue.
minus Sound 'object_name$'
Write to text file... 'directory$''object_name$'.TextGrid
select all
minus Strings list
Remove
endfor
select Strings list
Remove
clearinfo
printline TextGrids have been reviewed for 'word$'.'filetype$' files in
printline 'directory$'.
## written by Katherine Crosswhite
## crosswhi#ling.rochester.edu
I first thought that Praat simply cannot re-review files that have been reviewed previously and tried to re-run the script on only those files I had not reviewed before. The issue kept occurring.
Then I tried running the script on an entirely different directory, with the same result.
I tried clearing up the Praat history (assuming that this might be any kind of traceback error).
I also tried including the clearinfo command in the beginning of the script.
Nothing of that made any difference.
To sum up, I played around a bit but could not find out why Praat thinks that all files have been reviewed already.