Thanks for confirming!

This will be fixed in Textastic 10.9.5 which is currently in beta.

Hello,

use View -> Show Sidebar. Then click the "Add Folder…" button in the sidebar.

Alternatively, use File -> Open (Cmd-O), navigate to a folder and click Open.

What happens when you try to open such a file? Does it show "Preview is not available for this file"? In that case, Textastic thinks that you are trying to open a binary file.

You choose "Open as Text File" from the file's context menu to open it as a text file anyway.

Where are your .pgn files stored? iCloud Drive?

Maybe there is another app installed that registered .pgn as a binary file format in the system.

Hello,

Both the one-time purchase and the subscription for Textastic Pro support Family Sharing.

However, Family Sharing must be set up correctly for this to work:

If you’ve enabled Purchase Sharing under “Family” in the Settings app and “Share Purchases” is also enabled for your account, Family Sharing should work.

See https://support.apple.com/en-us/108774 for details on how to enable Purchase Sharing for your account.

Textastic Pro should then be automatically activated on devices that are part of the Apple Family. It’s important that a shared payment method is set up.

I can see similar problems when editing text files in OneDrive using the Runestone app:

• In Runestone, I opened a file from OneDrive
• I added a line
• Hit "Done" to close the file
• When I open the file again, my changes are not visible

In iA Writer, I also see changes disappearing, but the behavior is different than in Textastic and Runestone.

So it looks like Microsoft has a bug in their OneDrive file provider.

I just tried to reproduce the issue with OneDrive on my iPhone:

• Use "Open…" to open a text file from OneDrive
• Add text to the file
• Close the file

When I now open the file again from "Recent Files" in Textastic, the changes I made to the file are not there. 

But, if I open the file again using the "Open…" command, the changes are there! Also, when I view the file in the OneDrive app, I can see the changes.

Can you please try to view the file in the OneDrive app or use "Open…" to open the file again?

This looks like a bug in the OneDrive file provider.

Also, there is a file version history on https://onedrive.live.com/ under "My Files" where you can restore previous versions of the file. See https://support.microsoft.com/en-us/office/restore-a-previous-version-of-a-file-stored-in-onedrive-159cad6d-d76e-4981-88ef-de6e96c93893

I'm hopeful that you can use that to restore your file in case using "Open…" again does not work.