After contact and dialogue with <Deleted> , I've been advised to contact the MQL5 service desk?
So, how can I reactivate the Indicator ?
THis is a users' forum, it is not the service desk

- www.mql5.com
Some months ago I purchased the "<Deleted>" which until last week was working well.
While Initially the indicator worked well, recently however the indicator disappeared from my charts and cannot be reinstalled.
Although I only used 2 activations, the "Experts" tab display following message:
2020.12.25 23:46:04.995 <Deleted> invalid license (538)
After contact and dialogue with <Deleted> , I've been advised to contact the MQL5 service desk?
So, how can I reactivate the Indicator ?
I think - it is related to the Windows update.
If it is related to the Windows 10 updates so you can re-install your purchases (but one activation will be lost because of that):
Forum on trading, automated trading systems and testing trading strategies
Indicators has stop working after yesterdays (11/8/2016) windows 10 update Please HELP!
Daniel Stein, 2016.08.12 10:55
Please follow these three steps:
- At first you have to delete the "old/invalid" market products in the Navigator of your terminal
- Second you restart your terminal
- Now you are able to reinstall your products with a newly generated license

- 2016.06.30
- www.mql5.com
I think - it is related to the Windows update.
If it is related to the Windows 10 updates so you can re-install your purchases (but one activation will be lost because of that):
Thanks Sergey, however there's been no update since and by removing and reinstall due to external factors I'm running out of the activation provision.
So the issue of "invalid license (538)" error must be cleared and corrected bij MQL
Thanks Sergey, however there's been no update since and by removing and reinstall due to external factors I'm running out of the activation provision.
So the issue of "invalid license (538)" error must be cleared and corrected bij MQL
I am replying on many forum posts, and as I know - this error is related to Windows 10 update or hardware update (in most of the cases).
And you should delete your purchase and install it once again directly from your Metatrader.
As far as I know - MetaQuotes company is adding additional activations for for all the buyers (it is not added in individual basis) - read this post:
Forum on trading, automated trading systems and testing trading strategies
Windows Updates Making Purchased Indicators Stop Working
Sergey Golubev, 2020.12.10 19:11
As I remember it was in 6th of June when the activations were added: Windows 10 May 2020 Update (version 2004) released - activations for purchased Market products addedHi Keith,
Thanks for your reaction, however when going through your "Service Desk" I'm getting this reply:
=> Please note that we deal only with financial operation issues. If you have another question, ask it on the Forum .
So here I'm back on the "Forum" as my issue is of Technical order.
read this post #26 about the "proofs" (I mean - no one will discuss/speak/fix anything here and on the service desk without any proofs, and it is the responsibility of the users to rpviode the proofs which may be eno8ugh for the service desk to reproduce this situation).

- 2019.03.05
- www.mql5.com
I found more about it - for example:
Forum on trading, automated trading systems and testing trading strategies
Sergey Golubev, 2020.09.02 08:00
You should re-install the product from the Market tab in Metatrader (delete old and reinstalled once again).
But read this thread before deleting/re-installing anything:
Windows 10 update and product license problems

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Some months ago I purchased the "<Deleted>" which until last week was working well.
While Initially the indicator worked well, recently however the indicator disappeared from my charts and cannot be reinstalled.
Although I only used 2 activations, the "Experts" tab display following message:
2020.12.25 23:46:04.995 <Deleted> invalid license (538)
After contact and dialogue with <Deleted> , I've been advised to contact the MQL5 service desk?
So, how can I reactivate the Indicator ?