I have worked the whole day with Tags on my database and have managed to mess it up :-(. I think that I may need to go back to an old backup (I assume that I would just rename SNBKM to SNDB?)

Part of it the corruption may be because of my incomplete understanding. Please answer my questions, even if they are Trivial and explained in the manual..
Consider this simple example of Tag hierarchy
MainGrid
    LastGrid
    StatusGrid
             DoNow
             Done    

By Default, new items are added to the Inbox Grid (with Source = Inbox field) when the "New Item to IQBase" window is used.

If I look at the Inbox field in the window, it is not automatically checked. However, after clicking on OK, the field is automatically checked and the new item is therefore shown in the Inbox Grid.

Now, I wanted to use an "Inbox" Tag instead of the  "Inbox" field as a source for the "Inbox Grid", but that doesn't work. After clicking on OK, the  "Inbox" Tag is not checked and the item therefore doesn't show in the Grid.

I made the new item window as wide as I could, but the Tag pane cannot be expanded enough. It is too narrow to see the child Tags. Maybe a bug?

I copied several items which have children including some URLs from Ecco.
For example:

Item ABC
       www.google.com
       SomeChild1

Item DEF
       www.yahoo.com
       SomeChild2

I pasted-special the items to IQ as Tab-indented.

I have backed up my viking.SNDB using:
1. Manual backup, which creates a file viking.SNBKM. (This file is overwritten each time I create a manual backup)
and
2. Auto backup, which creates incrementally dates files like viking.20220724-1432.SNBKA.

A viking.ini file is also created in the backup folder.

How do I restore my backed up file? Do I simply rename the extension to SNDB?
What do I do with the viking.ini file?

p.s. I searched the help file for a book page with the word "restore" but I didn't find anything relevant.

Suddenly (after moving Tag locations in the Tag Pane), I am no longer able to add a Tag by using the Tag Column. All the values are grayed out. I can still add the Tags by checking them in the Tag Pane.

I started to Group-By Bar. When I open the file, the groups are expanded. Is there some way to Collapse/Expand all groups?
(I read this book page already https://infoqubeim.com/drupal5/node/864)

EDIT: I just realized that "ItemTagCount" doesn't match Nb in the Tag pane for any Tags in the Tag Grid (it is blank or shows "1"). I thought "ItemTagCount" was supposed to shows "Nb of tags for each item"? Is this a bug?
 

I have a tag "Type_B" which have several Child Tags.
"Type_B" shows "blank" for Nb in the Tag Pane.
In the Tag Grid, it shows "1" for "ItemTagCount"

Why do they differ? Could it be because I have a Grid called "Type_B" which has the source "#Type_B"?

What is the best way to find the single "Type_B" (according to the Tag Grid)?

1. Is "Backup using Dropbox" (mentioned as #3 here: http://infoqubeim.com/drupal5/node/987) the same as "Synchronization between computers " (discussed here: http://infoqubeim.com/drupal5/node/3066)?

How do I set this up? Thanks