dear Team,
I have been using Draftlight since last year.

In order to continue subscription I installed the 2020 version, but it does not work correctly.
There is a problem that all entities and cursor on the model screen are invisible.
It seems to be a display issue, as I can confirm the existence of entities on print preview.
I reinstalled Draftsight.
But it did not be improved.
I confirmed that graphics card driver's version is latest, and that system specification is enough.

Actually there was a bug that the cursor was not displayed on the model screen last year,
but I received an advice based on the article below.

DraftSight 2019 SP0 - Graphics issues
https://r1132100503382-eu1-3dswym.3dexperience.3ds.com/#community:51/post:kFzcbHOKS7qyeI9iUUTdQA

Afterwards I was been able to use it without problems.
From this experience I tried some changes on "system option", but the situation does not improve.
Please tell me how to improve.