The document icon has changed strangely. (default app settings)

If you check the contents below, you can set it to open with Polaris Office when opening a document.

If the link program for the document is not Polaris Office, it will be opened with another document program when the document is opened.

You can change the connected program in the following way.

1. Right-click a document saved on the desktop
2. Select Properties
3. On the General tab, select Change in Open With.
4. Select Polaris Office from other options and click OK.

In the same way as above, if you set the extension as a program to connect to Polaris Office, the document will be opened as Polaris Office.